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Genes are hereditary units that are responsible for the phenotypes of an organism. Genes are the directions for the body. Genetic change exists when genes are altered from their previous form. Genes are made up of DNA, or deoxyribonucleic acid. DNA is made up of four bases- adenine, guanine, cytosine, and thymine. Genetic change can result from a variety of factors. Both scientists mentioned below agree on this basic information about genes. However, the scientists do not agree on the primary driving force behind genetic change.
Scientist 1
A mutation is a permanent change in the sequence of the DNA of a gene. There are several types of mutations—point mutations, silent mutations, frame mutations, and nonsense mutations. Mutations are very important because proteins are synthesized by reading the DNA sequence. If the DNA sequence is changed, the proteins transcribed from the DNA will be different proteins. Mutations directly and substantially change the genes by changing the sequence of the four bases. Therefore, mutations are the main factor when looking at genetic change.
Scientist 2 
Sexual reproduction is the biggest contributor to genetic change. New combinations of genes are created with every random union of a sperm and egg. During division of the sex cells, or meiosis, crossing over can occur. Crossing over describes the situation when the genes from one parent’s chromosome are traded with genes from the other parent’s chromosome. This results in new combinations of genes. Lastly, a phenomenon called independent assortment results from sexual reproduction. Independent assortment is the random assortment of chromosomes during reproduction. Therefore, by its random nature, sexual reproduction is the largest contributor to genetic change.
Q. The viewpoints of Scientist 1 and Scientist 2 both support what theory? 
  • a)
    Sexual reproduction results in genetic change. 
  • b)
    Mutations are the biggest contributor to genetic change. 
  • c)
    Mutations during crossing over are the biggest contributor to genetic change. 
  • d)
    Genetic change is the variation of genes from one generation to another. 
Correct answer is option 'D'. Can you explain this answer?
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Genes are hereditary units that are responsible for the phenotypes of ...
The first paragraph discusses genetic change and describes it as the variation of genes from one generation to another. It goes on to say both scientists "agree on this basic information about genes."
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Genes are hereditary units that are responsible for the phenotypes of an organism. Genes are the directions for the body. Genetic change exists when genes are altered from their previous form. Genes are made up of DNA, or deoxyribonucleic acid. DNA is made up of four bases- adenine, guanine, cytosine, and thymine. Genetic change can result from a variety of factors. Both scientists mentioned below agree on this basic information about genes. However, the scientists do not agree on the primary driving force behind genetic change.Scientist 1A mutation is a permanent change in the sequence of the DNA of a gene. There are several types of mutations—point mutations, silent mutations, frame mutations, and nonsense mutations. Mutations are very important because proteins are synthesized by reading the DNA sequence. If the DNA sequence is changed, the proteins transcribed from the DNA will be different proteins. Mutations directly and substantially change the genes by changing the sequence of the four bases. Therefore, mutations are the main factor when looking at genetic change.Scientist 2Sexual reproduction is the biggest contributor to genetic change. New combinations of genes are created with every random union of a sperm and egg. During division of the sex cells, or meiosis, crossing over can occur. Crossing over describes the situation when the genes from one parent’s chromosome are traded with genes from the other parent’s chromosome. This results in new combinations of genes. Lastly, a phenomenon called independent assortment results from sexual reproduction. Independent assortment is the random assortment of chromosomes during reproduction. Therefore, by its random nature, sexual reproduction is the largest contributor to genetic change.What information would weaken the viewpoint of Scientist 1?

Direction:Read the passages and choose the best answer to each question.PassageNATURAL SCIENCE: Heredity and Gene-linkage: A Possible RelationshipThe ability of every organism on earth to repro-duce is the hallmark of life. Reproduction can be eitherasexual, involving a single parent, or sexual, involvingtwo parents. Sexual reproduction begets offspring that(5)inherit half of their genes from each parent. This trans-mission of genes from one generation to the next iscalled heredity.Each hereditary unit, the gene, contains specificencoded information that translates into an organism’s(10)inherited traits. Inherited traits range from hair color,to height to susceptibility to disease. Genes are actu-ally segments of the DNA molecule, and it is theprecise replication of DNA that produces copies ofgenes that can be passed from parents to offspring.(15)DNA is subdivided into chromosomes that each includehundreds or thousands of genes. The specific traits orcharacteristics of each offspring depend on the arrange-ment and combination of the chromosomes supplied byboth parents.(20)Genes located on the same chromosome tend tobe inherited together. Transmission of these so-calledlinked genes can affect the inheritance of two dif-ferent characteristics. Thomas Hunt Morgan was thefirst biologist to associate specific genes with specific(25)chromosomes. In the early 20th century, Morganselected a species of fruit fly, Drosophila melanogaster,on which to study his genetic theory. The fruit fly is aprolific breeder, producing hundreds of offspring in asingle mating. In addition, the fruit fly has only four(30)pairs of easily distinguishable chromosomes, makingit the ideal experimental organism. Soon after Morgancommenced working with Drosophila, he began tonotice variations in certain traits.For example, Morgan noticed that the natural(35)characteristics of Drosophila included gray bodiesand normal wings. However, mutant examples ofthese characteristics sometimes appeared; these flieshad black bodies, and much smaller, vestigial wings.Morgan crossed female flies that appeared normal, but(40)carried the mutant genes, with males that exhibited themutations. He expected the offspring to include equalnumbers of gray flies with normal wings, black flieswith vestigial wings, gray flies with vestigial wings,and black flies with normal wings. What he found was(45)a disproportionate number of gray flies with normalwings and black flies with vestigial wings, which sug-gested to him that the genes for body color and wingsize are transmitted together from parents to offspringbecause they are located on the same chromosome and(50)must be somehow linked.Additional research conducted by Morgan onD. melanogaster demonstrated that many, often spon-taneous mutations occur across generations. Theseobservations, together with the results of experiments(55)carried out to test his theory on linked genes, ledMorgan to postulate that the location of the genes onthe chromosomes contributes to the likelihood of anygiven gene being transmitted from parent to offspring.This theory of linear arrangement, along with Morgan’s(60)other important contributions to the field of genetics,led to his being awarded the Nobel Prize in Physiologyor Medicine in 1933.Current research exploring the significance oflinked genes reveals that many factors affect the trans-(65)mission of certain traits from parents to offspring. Thelocation of genes on a particular chromosome is but oneof a multitude of determinants involved in whether ornot a characteristic will be inherited.Q.The main idea of the passage is that

Direction:Read the passages and choose the best answer to each question.PassageNATURAL SCIENCE: Heredity and Gene-linkage: A Possible RelationshipThe ability of every organism on earth to repro-duce is the hallmark of life. Reproduction can be eitherasexual, involving a single parent, or sexual, involvingtwo parents. Sexual reproduction begets offspring thatLine 5inherit half of their genes from each parent. This trans-mission of genes from one generation to the next iscalled heredity.Each hereditary unit, the gene, contains specificencoded information that translates into an organism’s10inherited traits. Inherited traits range from hair color,to height to susceptibility to disease. Genes are actu-ally segments of the DNA molecule, and it is theprecise replication of DNA that produces copies ofgenes that can be passed from parents to offspring.15DNA is subdivided into chromosomes that each includehundreds or thousands of genes. The specific traits orcharacteristics of each offspring depend on the arrange-ment and combination of the chromosomes supplied byboth parents.20Genes located on the same chromosome tend tobe inherited together. Transmission of these so-calledlinked genes can affect the inheritance of two dif-ferent characteristics. Thomas Hunt Morgan was thefirst biologist to associate specific genes with specific25chromosomes. In the early 20th century, Morganselected a species of fruit fly, Drosophila melanogaster,on which to study his genetic theory. The fruit fly is aprolific breeder, producing hundreds of offspring in asingle mating. In addition, the fruit fly has only four30pairs of easily distinguishable chromosomes, makingit the ideal experimental organism. Soon after Morgancommenced working with Drosophila, he began tonotice variations in certain traits.For example, Morgan noticed that the natural35characteristics of Drosophila included gray bodiesand normal wings. However, mutant examples ofthese characteristics sometimes appeared; these flieshad black bodies, and much smaller, vestigial wings.Morgan crossed female flies that appeared normal, but40carried the mutant genes, with males that exhibited themutations. He expected the offspring to include equalnumbers of gray flies with normal wings, black flieswith vestigial wings, gray flies with vestigial wings,and black flies with normal wings. What he found was45a disproportionate number of gray flies with normalwings and black flies with vestigial wings, which sug-gested to him that the genes for body color and wingsize are transmitted together from parents to offspringbecause they are located on the same chromosome and50must be somehow linked.Additional research conducted by Morgan onD. melanogaster demonstrated that many, often spon-taneous mutations occur across generations. Theseobservations, together with the results of experiments55carried out to test his theory on linked genes, ledMorgan to postulate that the location of the genes onthe chromosomes contributes to the likelihood of anygiven gene being transmitted from parent to offspring.This theory of linear arrangement, along with Morgan’s60other important contributions to the field of genetics,led to his being awarded the Nobel Prize in Physiologyor Medicine in 1933.Current research exploring the significance oflinked genes reveals that many factors affect the trans-65mission of certain traits from parents to offspring. Thelocation of genes on a particular chromosome is but oneof a multitude of determinants involved in whether ornot a characteristic will be inherited.Q.According to the passage, asexual reproduction involves

Before modern technologies and experiments allowed scientists to understand different organisms mechanisms of reproduction, numerous theories existed about how populations came to exist. Two scientists from the 1800s describe their theories. Here are their arguments.Scientist IJust like some plants come from seeds and others are capable of vegetative (asexual) reproduction, some animal organisms come from non-sexual reproduction as well. Maggots, for example, appear on rotting carcasses. It is clearly illogical to suggest that the dead animal created or gave birth to the maggots, as it is no longer alive and is therefore incapable of sexual reproduction. The only rational conclusion for the appearance of maggots is a spontaneous generation. This is similar to how, if one were to leave a bowl of broth in the open air for a week, it would turn cloudy from bacteria appearing in the liquid.Scientist IIAnimate objects cannot arise from inanimate objects. Even when plants perform asexual reproduction, daughter plants are still coming from parent plants. There is no other example in nature of a living organism spontaneously coming into being. It is true that we observe maggots on rotting carcasses, but that does not necessarily mean that the maggots came from the rotting carcass. Similarly, bacteria growing in broth do not necessarily come directly from the broth. If a living organism appears, then it must have come from another animate object, even if we did not witness it. It is more likely that these invisible organisms have come in through the air and we simply do not see them until they have had a chance to replicate in these locations.Q. An experiment is performed in which a rotting carcass is vacuum sealed. After several weeks, no maggots are observed. The rotting carcass is removed from the vacuum seal, and several days later maggots are observed. Which theory does this best support?

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Genes are hereditary units that are responsible for the phenotypes of an organism. Genes are the directions for the body. Genetic change exists when genes are altered from their previous form. Genes are made up of DNA, or deoxyribonucleic acid. DNA is made up of four bases- adenine, guanine, cytosine, and thymine. Genetic change can result from a variety of factors. Both scientists mentioned below agree on this basic information about genes. However, the scientists do not agree on the primary driving force behind genetic change.Scientist 1A mutation is a permanent change in the sequence of the DNA of a gene. There are several types of mutations—point mutations, silent mutations, frame mutations, and nonsense mutations. Mutations are very important because proteins are synthesized by reading the DNA sequence. If the DNA sequence is changed, the proteins transcribed from the DNA will be different proteins. Mutations directly and substantially change the genes by changing the sequence of the four bases. Therefore, mutations are the main factor when looking at genetic change.Scientist 2Sexual reproduction is the biggest contributor to genetic change. New combinations of genes are created with every random union of a sperm and egg. During division of the sex cells, or meiosis, crossing over can occur. Crossing over describes the situation when the genes from one parent’s chromosome are traded with genes from the other parent’s chromosome. This results in new combinations of genes. Lastly, a phenomenon called independent assortment results from sexual reproduction. Independent assortment is the random assortment of chromosomes during reproduction. Therefore, by its random nature, sexual reproduction is the largest contributor to genetic change.Q. The viewpoints of Scientist 1 and Scientist 2 both support what theory?a)Sexual reproduction results in genetic change.b)Mutations are the biggest contributor to genetic change.c)Mutations during crossing over are the biggest contributor to genetic change.d)Genetic change is the variation of genes from one generation to another.Correct answer is option 'D'. Can you explain this answer?
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Genes are hereditary units that are responsible for the phenotypes of an organism. Genes are the directions for the body. Genetic change exists when genes are altered from their previous form. Genes are made up of DNA, or deoxyribonucleic acid. DNA is made up of four bases- adenine, guanine, cytosine, and thymine. Genetic change can result from a variety of factors. Both scientists mentioned below agree on this basic information about genes. However, the scientists do not agree on the primary driving force behind genetic change.Scientist 1A mutation is a permanent change in the sequence of the DNA of a gene. There are several types of mutations—point mutations, silent mutations, frame mutations, and nonsense mutations. Mutations are very important because proteins are synthesized by reading the DNA sequence. If the DNA sequence is changed, the proteins transcribed from the DNA will be different proteins. Mutations directly and substantially change the genes by changing the sequence of the four bases. Therefore, mutations are the main factor when looking at genetic change.Scientist 2Sexual reproduction is the biggest contributor to genetic change. New combinations of genes are created with every random union of a sperm and egg. During division of the sex cells, or meiosis, crossing over can occur. Crossing over describes the situation when the genes from one parent’s chromosome are traded with genes from the other parent’s chromosome. This results in new combinations of genes. Lastly, a phenomenon called independent assortment results from sexual reproduction. Independent assortment is the random assortment of chromosomes during reproduction. Therefore, by its random nature, sexual reproduction is the largest contributor to genetic change.Q. The viewpoints of Scientist 1 and Scientist 2 both support what theory?a)Sexual reproduction results in genetic change.b)Mutations are the biggest contributor to genetic change.c)Mutations during crossing over are the biggest contributor to genetic change.d)Genetic change is the variation of genes from one generation to another.Correct answer is option 'D'. Can you explain this answer? for ACT 2025 is part of ACT preparation. The Question and answers have been prepared according to the ACT exam syllabus. Information about Genes are hereditary units that are responsible for the phenotypes of an organism. Genes are the directions for the body. Genetic change exists when genes are altered from their previous form. Genes are made up of DNA, or deoxyribonucleic acid. DNA is made up of four bases- adenine, guanine, cytosine, and thymine. Genetic change can result from a variety of factors. Both scientists mentioned below agree on this basic information about genes. However, the scientists do not agree on the primary driving force behind genetic change.Scientist 1A mutation is a permanent change in the sequence of the DNA of a gene. There are several types of mutations—point mutations, silent mutations, frame mutations, and nonsense mutations. Mutations are very important because proteins are synthesized by reading the DNA sequence. If the DNA sequence is changed, the proteins transcribed from the DNA will be different proteins. Mutations directly and substantially change the genes by changing the sequence of the four bases. Therefore, mutations are the main factor when looking at genetic change.Scientist 2Sexual reproduction is the biggest contributor to genetic change. New combinations of genes are created with every random union of a sperm and egg. During division of the sex cells, or meiosis, crossing over can occur. Crossing over describes the situation when the genes from one parent’s chromosome are traded with genes from the other parent’s chromosome. This results in new combinations of genes. Lastly, a phenomenon called independent assortment results from sexual reproduction. Independent assortment is the random assortment of chromosomes during reproduction. Therefore, by its random nature, sexual reproduction is the largest contributor to genetic change.Q. The viewpoints of Scientist 1 and Scientist 2 both support what theory?a)Sexual reproduction results in genetic change.b)Mutations are the biggest contributor to genetic change.c)Mutations during crossing over are the biggest contributor to genetic change.d)Genetic change is the variation of genes from one generation to another.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for ACT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Genes are hereditary units that are responsible for the phenotypes of an organism. Genes are the directions for the body. Genetic change exists when genes are altered from their previous form. Genes are made up of DNA, or deoxyribonucleic acid. DNA is made up of four bases- adenine, guanine, cytosine, and thymine. Genetic change can result from a variety of factors. Both scientists mentioned below agree on this basic information about genes. However, the scientists do not agree on the primary driving force behind genetic change.Scientist 1A mutation is a permanent change in the sequence of the DNA of a gene. There are several types of mutations—point mutations, silent mutations, frame mutations, and nonsense mutations. Mutations are very important because proteins are synthesized by reading the DNA sequence. If the DNA sequence is changed, the proteins transcribed from the DNA will be different proteins. Mutations directly and substantially change the genes by changing the sequence of the four bases. Therefore, mutations are the main factor when looking at genetic change.Scientist 2Sexual reproduction is the biggest contributor to genetic change. New combinations of genes are created with every random union of a sperm and egg. During division of the sex cells, or meiosis, crossing over can occur. Crossing over describes the situation when the genes from one parent’s chromosome are traded with genes from the other parent’s chromosome. This results in new combinations of genes. Lastly, a phenomenon called independent assortment results from sexual reproduction. Independent assortment is the random assortment of chromosomes during reproduction. Therefore, by its random nature, sexual reproduction is the largest contributor to genetic change.Q. The viewpoints of Scientist 1 and Scientist 2 both support what theory?a)Sexual reproduction results in genetic change.b)Mutations are the biggest contributor to genetic change.c)Mutations during crossing over are the biggest contributor to genetic change.d)Genetic change is the variation of genes from one generation to another.Correct answer is option 'D'. Can you explain this answer?.
Solutions for Genes are hereditary units that are responsible for the phenotypes of an organism. Genes are the directions for the body. Genetic change exists when genes are altered from their previous form. Genes are made up of DNA, or deoxyribonucleic acid. DNA is made up of four bases- adenine, guanine, cytosine, and thymine. Genetic change can result from a variety of factors. Both scientists mentioned below agree on this basic information about genes. However, the scientists do not agree on the primary driving force behind genetic change.Scientist 1A mutation is a permanent change in the sequence of the DNA of a gene. There are several types of mutations—point mutations, silent mutations, frame mutations, and nonsense mutations. Mutations are very important because proteins are synthesized by reading the DNA sequence. If the DNA sequence is changed, the proteins transcribed from the DNA will be different proteins. Mutations directly and substantially change the genes by changing the sequence of the four bases. Therefore, mutations are the main factor when looking at genetic change.Scientist 2Sexual reproduction is the biggest contributor to genetic change. New combinations of genes are created with every random union of a sperm and egg. During division of the sex cells, or meiosis, crossing over can occur. Crossing over describes the situation when the genes from one parent’s chromosome are traded with genes from the other parent’s chromosome. This results in new combinations of genes. Lastly, a phenomenon called independent assortment results from sexual reproduction. Independent assortment is the random assortment of chromosomes during reproduction. Therefore, by its random nature, sexual reproduction is the largest contributor to genetic change.Q. The viewpoints of Scientist 1 and Scientist 2 both support what theory?a)Sexual reproduction results in genetic change.b)Mutations are the biggest contributor to genetic change.c)Mutations during crossing over are the biggest contributor to genetic change.d)Genetic change is the variation of genes from one generation to another.Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for ACT. Download more important topics, notes, lectures and mock test series for ACT Exam by signing up for free.
Here you can find the meaning of Genes are hereditary units that are responsible for the phenotypes of an organism. Genes are the directions for the body. Genetic change exists when genes are altered from their previous form. Genes are made up of DNA, or deoxyribonucleic acid. DNA is made up of four bases- adenine, guanine, cytosine, and thymine. Genetic change can result from a variety of factors. Both scientists mentioned below agree on this basic information about genes. However, the scientists do not agree on the primary driving force behind genetic change.Scientist 1A mutation is a permanent change in the sequence of the DNA of a gene. There are several types of mutations—point mutations, silent mutations, frame mutations, and nonsense mutations. Mutations are very important because proteins are synthesized by reading the DNA sequence. If the DNA sequence is changed, the proteins transcribed from the DNA will be different proteins. Mutations directly and substantially change the genes by changing the sequence of the four bases. Therefore, mutations are the main factor when looking at genetic change.Scientist 2Sexual reproduction is the biggest contributor to genetic change. New combinations of genes are created with every random union of a sperm and egg. During division of the sex cells, or meiosis, crossing over can occur. Crossing over describes the situation when the genes from one parent’s chromosome are traded with genes from the other parent’s chromosome. This results in new combinations of genes. Lastly, a phenomenon called independent assortment results from sexual reproduction. Independent assortment is the random assortment of chromosomes during reproduction. Therefore, by its random nature, sexual reproduction is the largest contributor to genetic change.Q. The viewpoints of Scientist 1 and Scientist 2 both support what theory?a)Sexual reproduction results in genetic change.b)Mutations are the biggest contributor to genetic change.c)Mutations during crossing over are the biggest contributor to genetic change.d)Genetic change is the variation of genes from one generation to another.Correct answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Genes are hereditary units that are responsible for the phenotypes of an organism. Genes are the directions for the body. Genetic change exists when genes are altered from their previous form. Genes are made up of DNA, or deoxyribonucleic acid. DNA is made up of four bases- adenine, guanine, cytosine, and thymine. Genetic change can result from a variety of factors. Both scientists mentioned below agree on this basic information about genes. However, the scientists do not agree on the primary driving force behind genetic change.Scientist 1A mutation is a permanent change in the sequence of the DNA of a gene. There are several types of mutations—point mutations, silent mutations, frame mutations, and nonsense mutations. Mutations are very important because proteins are synthesized by reading the DNA sequence. If the DNA sequence is changed, the proteins transcribed from the DNA will be different proteins. Mutations directly and substantially change the genes by changing the sequence of the four bases. Therefore, mutations are the main factor when looking at genetic change.Scientist 2Sexual reproduction is the biggest contributor to genetic change. New combinations of genes are created with every random union of a sperm and egg. During division of the sex cells, or meiosis, crossing over can occur. Crossing over describes the situation when the genes from one parent’s chromosome are traded with genes from the other parent’s chromosome. This results in new combinations of genes. Lastly, a phenomenon called independent assortment results from sexual reproduction. Independent assortment is the random assortment of chromosomes during reproduction. Therefore, by its random nature, sexual reproduction is the largest contributor to genetic change.Q. The viewpoints of Scientist 1 and Scientist 2 both support what theory?a)Sexual reproduction results in genetic change.b)Mutations are the biggest contributor to genetic change.c)Mutations during crossing over are the biggest contributor to genetic change.d)Genetic change is the variation of genes from one generation to another.Correct answer is option 'D'. Can you explain this answer?, a detailed solution for Genes are hereditary units that are responsible for the phenotypes of an organism. Genes are the directions for the body. Genetic change exists when genes are altered from their previous form. Genes are made up of DNA, or deoxyribonucleic acid. DNA is made up of four bases- adenine, guanine, cytosine, and thymine. Genetic change can result from a variety of factors. Both scientists mentioned below agree on this basic information about genes. However, the scientists do not agree on the primary driving force behind genetic change.Scientist 1A mutation is a permanent change in the sequence of the DNA of a gene. There are several types of mutations—point mutations, silent mutations, frame mutations, and nonsense mutations. Mutations are very important because proteins are synthesized by reading the DNA sequence. If the DNA sequence is changed, the proteins transcribed from the DNA will be different proteins. Mutations directly and substantially change the genes by changing the sequence of the four bases. Therefore, mutations are the main factor when looking at genetic change.Scientist 2Sexual reproduction is the biggest contributor to genetic change. New combinations of genes are created with every random union of a sperm and egg. During division of the sex cells, or meiosis, crossing over can occur. Crossing over describes the situation when the genes from one parent’s chromosome are traded with genes from the other parent’s chromosome. This results in new combinations of genes. Lastly, a phenomenon called independent assortment results from sexual reproduction. Independent assortment is the random assortment of chromosomes during reproduction. Therefore, by its random nature, sexual reproduction is the largest contributor to genetic change.Q. The viewpoints of Scientist 1 and Scientist 2 both support what theory?a)Sexual reproduction results in genetic change.b)Mutations are the biggest contributor to genetic change.c)Mutations during crossing over are the biggest contributor to genetic change.d)Genetic change is the variation of genes from one generation to another.Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of Genes are hereditary units that are responsible for the phenotypes of an organism. Genes are the directions for the body. Genetic change exists when genes are altered from their previous form. Genes are made up of DNA, or deoxyribonucleic acid. DNA is made up of four bases- adenine, guanine, cytosine, and thymine. Genetic change can result from a variety of factors. Both scientists mentioned below agree on this basic information about genes. However, the scientists do not agree on the primary driving force behind genetic change.Scientist 1A mutation is a permanent change in the sequence of the DNA of a gene. There are several types of mutations—point mutations, silent mutations, frame mutations, and nonsense mutations. Mutations are very important because proteins are synthesized by reading the DNA sequence. If the DNA sequence is changed, the proteins transcribed from the DNA will be different proteins. Mutations directly and substantially change the genes by changing the sequence of the four bases. Therefore, mutations are the main factor when looking at genetic change.Scientist 2Sexual reproduction is the biggest contributor to genetic change. New combinations of genes are created with every random union of a sperm and egg. During division of the sex cells, or meiosis, crossing over can occur. Crossing over describes the situation when the genes from one parent’s chromosome are traded with genes from the other parent’s chromosome. This results in new combinations of genes. Lastly, a phenomenon called independent assortment results from sexual reproduction. Independent assortment is the random assortment of chromosomes during reproduction. Therefore, by its random nature, sexual reproduction is the largest contributor to genetic change.Q. The viewpoints of Scientist 1 and Scientist 2 both support what theory?a)Sexual reproduction results in genetic change.b)Mutations are the biggest contributor to genetic change.c)Mutations during crossing over are the biggest contributor to genetic change.d)Genetic change is the variation of genes from one generation to another.Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Genes are hereditary units that are responsible for the phenotypes of an organism. Genes are the directions for the body. Genetic change exists when genes are altered from their previous form. Genes are made up of DNA, or deoxyribonucleic acid. DNA is made up of four bases- adenine, guanine, cytosine, and thymine. Genetic change can result from a variety of factors. Both scientists mentioned below agree on this basic information about genes. However, the scientists do not agree on the primary driving force behind genetic change.Scientist 1A mutation is a permanent change in the sequence of the DNA of a gene. There are several types of mutations—point mutations, silent mutations, frame mutations, and nonsense mutations. Mutations are very important because proteins are synthesized by reading the DNA sequence. If the DNA sequence is changed, the proteins transcribed from the DNA will be different proteins. Mutations directly and substantially change the genes by changing the sequence of the four bases. Therefore, mutations are the main factor when looking at genetic change.Scientist 2Sexual reproduction is the biggest contributor to genetic change. New combinations of genes are created with every random union of a sperm and egg. During division of the sex cells, or meiosis, crossing over can occur. Crossing over describes the situation when the genes from one parent’s chromosome are traded with genes from the other parent’s chromosome. This results in new combinations of genes. Lastly, a phenomenon called independent assortment results from sexual reproduction. Independent assortment is the random assortment of chromosomes during reproduction. Therefore, by its random nature, sexual reproduction is the largest contributor to genetic change.Q. The viewpoints of Scientist 1 and Scientist 2 both support what theory?a)Sexual reproduction results in genetic change.b)Mutations are the biggest contributor to genetic change.c)Mutations during crossing over are the biggest contributor to genetic change.d)Genetic change is the variation of genes from one generation to another.Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice ACT tests.
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