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All questions of Analytic Methods (BIO) for MCAT Exam
Gene drift occurs when gene migration occurs ______- a)by chance
- b)spontaneously
- c)slowly
- d)due to disaster
Correct answer is option 'A'. Can you explain this answer?
Gene drift occurs when gene migration occurs ______
a)
by chance
b)
spontaneously
c)
slowly
d)
due to disaster
|
Jyoti Sengupta answered |
Gene flow occurs when gene migration occurs many or multiple times. When this occurs by a chance, a process called gene drift occurs. It cannot occur spontaneously, slowly or due to a disaster.
How many factors affect the Hardy Weinberg principle?- a)Six
- b)Four
- c)Seven
- d)Five
Correct answer is option 'D'. Can you explain this answer?
How many factors affect the Hardy Weinberg principle?
a)
Six
b)
Four
c)
Seven
d)
Five
|
Priya Menon answered |
Hardy Weinberg stated that there are six factors affecting this principle. They are Gene migration or gene flow, genetic drift, mutation, genetic recombination, and natural selection. Each factor plays a major role in evolution.
Which of the following does not belong to the Hardy Weinberg principle?- a)Frequency remained fixed through generations
- b)Used algebraic equations
- c)Allele frequency varies from species
- d)Gene pool remains a constan
Correct answer is option 'C'. Can you explain this answer?
Which of the following does not belong to the Hardy Weinberg principle?
a)
Frequency remained fixed through generations
b)
Used algebraic equations
c)
Allele frequency varies from species
d)
Gene pool remains a constan
|
Suresh Iyer answered |
Allele frequencies does not vary from species to species. In a population, the frequency always remains fixed or constant according to Hardy Weinberg principle. The alleles and total genes in any population remain constant and hence stable.
What happens during disruptive selection?- a)Three peaks are formed
- b)Extreme value gets rejected
- c)Average value gets selected
- d)Members of both extreme are selected
Correct answer is option 'D'. Can you explain this answer?
What happens during disruptive selection?
a)
Three peaks are formed
b)
Extreme value gets rejected
c)
Average value gets selected
d)
Members of both extreme are selected
|
|
Jyoti Sengupta answered |
In disruptive selection, the members of both extreme are selected. The average gets rejected. Most of the individuals get values other than the mean character value. The naturally selected members are shown by two peaks.
Which of the following is not included in natural selection?- a)Stabilizing selection
- b)Directional selection
- c)Disruptive selection
- d)Technical selection
Correct answer is option 'D'. Can you explain this answer?
Which of the following is not included in natural selection?
a)
Stabilizing selection
b)
Directional selection
c)
Disruptive selection
d)
Technical selection
|
Dev Patel answered |
Natural selection mainly leads to three selections. They are: Stabilizing selection, directional selection, and disruptive selection. Technical selection does not belong to natural selection. This classification is based on different organism-environmental relationship.
How many peaks are there in the disruptive selection?- a)One
- b)Two
- c)Three
- d)No peaks
Correct answer is option 'B'. Can you explain this answer?
How many peaks are there in the disruptive selection?
a)
One
b)
Two
c)
Three
d)
No peaks
|
Riya Banerjee answered |
In disruptive selection, most of the individuals get the periphery values at both ends of the curve given in the graph. The population gets divided into two different groups. Hence, they have two peaks which resemble a two-humped camel.
Which of the following are properties of stabilizing selection?- a)Operates in a constant environment
- b)Mean value changes
- c)Peak gets lower and wider
- d)Favors the complex phenotype
Correct answer is option 'A'. Can you explain this answer?
Which of the following are properties of stabilizing selection?
a)
Operates in a constant environment
b)
Mean value changes
c)
Peak gets lower and wider
d)
Favors the complex phenotype
|
Lalit Yadav answered |
Stabilizing selection operates in a constant environment. It favors the average or complex phenotype and eliminates the extreme values. The mean value never changes. Also, the peak gets higher and narrower.
Directional selection is also known as ______- a)Position selection
- b)Progressive selection
- c)Retrogressive selection
- d)Main selection
Correct answer is option 'B'. Can you explain this answer?
Directional selection is also known as ______
a)
Position selection
b)
Progressive selection
c)
Retrogressive selection
d)
Main selection
|
|
Priya Menon answered |
Directional selection is also known as progressive selection. This selection always operates in a changing environment. After this natural selection, mean value always changed.
It is known that the total sum of all the frequencies of the allele is _____- a)one
- b)two
- c)three
- d)four
Correct answer is option 'A'. Can you explain this answer?
It is known that the total sum of all the frequencies of the allele is _____
a)
one
b)
two
c)
three
d)
four
|
Geetika Shah answered |
According to Hardy Weinberg principle, the total sum of all the frequencies of the allele is one. It shows that the gene pool remains the same or constant, i.e. one. Hence, it can be also termed as genetic equilibrium.
Marine mollusca is also known as _____- a)Limpets
- b)Crabs
- c)Puppets
- d)Shrews
Correct answer is option 'A'. Can you explain this answer?
Marine mollusca is also known as _____
a)
Limpets
b)
Crabs
c)
Puppets
d)
Shrews
|
Ananya Das answered |
Marine mollusca is also known as limpets. They are aquatic snails with a conical shaped shell with a muscular foot. They are members of the family Gastropoda. Their shell pattern shows disruptive selection.
The process when some species migrate from the original to a new place, which in turn changes the allele frequency is called ______- a)Gene drift
- b)Gene migration
- c)Gene travel
- d)Genetic recombination
Correct answer is option 'B'. Can you explain this answer?
The process when some species migrate from the original to a new place, which in turn changes the allele frequency is called ______
a)
Gene drift
b)
Gene migration
c)
Gene travel
d)
Genetic recombination
|
Jhanvi Bajaj answered |
Migration is the movement of individuals or species from one place to another. It can occur in various forms, such as when individuals move from one habitat to another, or when entire populations migrate to a new geographical location. Migration plays a crucial role in shaping the genetic diversity of populations and can lead to changes in allele frequencies.
Gene migration, also known as gene flow, refers to the movement of genetic material from one population to another. This can occur when individuals migrate and successfully reproduce in a different population. Gene migration can introduce new alleles into a population, increasing its genetic diversity.
Gene migration and allele frequency change:
When individuals migrate from their original population to a new location, they bring their genetic material with them. As they reproduce with individuals from the new population, their genes are mixed with the genes of the local population. This can result in the transfer of alleles from one population to another, changing the allele frequencies in both populations.
Explanation:
- Gene migration refers to the movement of genetic material from one population to another.
- When individuals migrate, they bring their genes with them to the new population.
- As individuals from different populations reproduce, their genes mix, leading to changes in allele frequencies.
- Gene migration can introduce new alleles into a population, increasing its genetic diversity.
- The process of gene migration is a key factor in evolution and can lead to the formation of new species.
- Gene migration can occur through various means, such as animal dispersal, seed dispersal, or human migration.
- The extent of gene migration can vary depending on the migration rate and the genetic differences between populations.
- Gene migration can counteract the effects of genetic drift and maintain genetic diversity within populations.
- It can also lead to the spread of beneficial alleles or the introduction of harmful alleles into new populations.
In summary, gene migration is the process by which individuals or species migrate from one population to another, resulting in the transfer of genetic material and changes in allele frequencies. It is an important mechanism in evolution and can play a significant role in shaping the genetic diversity of populations.
Gene migration, also known as gene flow, refers to the movement of genetic material from one population to another. This can occur when individuals migrate and successfully reproduce in a different population. Gene migration can introduce new alleles into a population, increasing its genetic diversity.
Gene migration and allele frequency change:
When individuals migrate from their original population to a new location, they bring their genetic material with them. As they reproduce with individuals from the new population, their genes are mixed with the genes of the local population. This can result in the transfer of alleles from one population to another, changing the allele frequencies in both populations.
Explanation:
- Gene migration refers to the movement of genetic material from one population to another.
- When individuals migrate, they bring their genes with them to the new population.
- As individuals from different populations reproduce, their genes mix, leading to changes in allele frequencies.
- Gene migration can introduce new alleles into a population, increasing its genetic diversity.
- The process of gene migration is a key factor in evolution and can lead to the formation of new species.
- Gene migration can occur through various means, such as animal dispersal, seed dispersal, or human migration.
- The extent of gene migration can vary depending on the migration rate and the genetic differences between populations.
- Gene migration can counteract the effects of genetic drift and maintain genetic diversity within populations.
- It can also lead to the spread of beneficial alleles or the introduction of harmful alleles into new populations.
In summary, gene migration is the process by which individuals or species migrate from one population to another, resulting in the transfer of genetic material and changes in allele frequencies. It is an important mechanism in evolution and can play a significant role in shaping the genetic diversity of populations.
Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as:- a)Genetic drift
- b)Random mating
- c)Genetic load
- d)Genetic flow
Correct answer is option 'A'. Can you explain this answer?
Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as:
a)
Genetic drift
b)
Random mating
c)
Genetic load
d)
Genetic flow
|
Stepway Academy answered |
- There would be a gene flow if this gene migration, happens multiple times.
- If the same change occurs by chance, it is called genetic drift.
The notation p and q of the Hardy Weinberg equation represent ________ of a diploid organism.- a)frequency of allele p
- b)frequency of only allele A
- c)frequency of the only allele a
- d)frequency of allele A and a
Correct answer is option 'D'. Can you explain this answer?
The notation p and q of the Hardy Weinberg equation represent ________ of a diploid organism.
a)
frequency of allele p
b)
frequency of only allele A
c)
frequency of the only allele a
d)
frequency of allele A and a
|
|
Riya Banerjee answered |
Individual frequencies can be represented as p and q. But for a diploid organism, p and q explain the frequency of allele A and allele a. p2 represents AA whereas q2 represent aa.
How does shell pattern in limpets show disruptive selection?- a)The shell pattern is yellowish and discontinuous
- b)Light-colored limpets were preyed
- c)Tan colored limpets were preyed
- d)Intermediate colored limpets were preyed
Correct answer is option 'D'. Can you explain this answer?
How does shell pattern in limpets show disruptive selection?
a)
The shell pattern is yellowish and discontinuous
b)
Light-colored limpets were preyed
c)
Tan colored limpets were preyed
d)
Intermediate colored limpets were preyed
|
|
Raghav Bansal answered |
Limpets shell has a continuous pattern with color ranging from pure white to dark tan. They either attached to white gooseneck barnacles or to tan colored rocks. The light-colored limpets camouflaged with white barnacles while tanned limpets camouflaged on tan-colored rocks. But, the limpets with intermediate shell patterns were conspicuous and were preyed by predatory shorebirds.
Which of the following does not belong to factors affecting the Hardy Weinberg principle?- a)Gene migration
- b)Genetic drift
- c)Genetic drop
- d)Mutation
Correct answer is option 'C'. Can you explain this answer?
Which of the following does not belong to factors affecting the Hardy Weinberg principle?
a)
Gene migration
b)
Genetic drift
c)
Genetic drop
d)
Mutation
|
|
Dev Patel answered |
There are six factors affecting this principle. Among the factors, the genetic drop is not included in them. They only include Gene migration or gene flow, genetic drift, mutation, genetic recombination, and natural selection.
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