Class 10 Exam > Class 10 Videos > Crash Course: Class 10 > Do Organisms create exact copies of themselves all about DNA
Do Organisms create exact copies of themselves all about DNA Video Lecture | Crash Course: Class 10
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FAQs on Do Organisms create exact copies of themselves all about DNA Video Lecture - Crash Course: Class 10
| 1. Do organisms always create exact copies of themselves? |  |
Ans. No, organisms do not always create exact copies of themselves. While reproduction involves the passing of genetic material from one generation to the next, there is always a chance for variations or mutations to occur during the process. These variations can result in offspring that are slightly different from their parents, contributing to genetic diversity within a species.
| 2. What is DNA and how does it relate to creating exact copies of organisms? | |
Ans. DNA (deoxyribonucleic acid) is a molecule that contains the genetic instructions for the development and functioning of all living organisms. It is responsible for transmitting hereditary information from one generation to the next. When organisms reproduce, they pass on their DNA to their offspring, which serves as a blueprint for the development of the new organism. While DNA provides the basis for creating similar organisms, variations can occur due to mutations or genetic recombination.
| 3. What are some factors that can cause variations during the reproduction process? | |
Ans. Several factors can contribute to variations during the reproduction process. One major factor is genetic mutations, which are spontaneous changes in the DNA sequence. Mutations can occur due to errors in DNA replication or exposure to certain environmental factors like radiation or chemicals. Another factor is genetic recombination, which happens during sexual reproduction when genetic material from two parents combines to form a new combination of genes in the offspring.
| 4. How does genetic diversity benefit a species? | |
Ans. Genetic diversity is essential for the survival and adaptation of a species. It increases the chances of a species to withstand environmental changes, diseases, and other challenges. A diverse gene pool provides a wider range of traits and characteristics, allowing a species to have individuals with different strengths and abilities. This diversity enhances the species' ability to adapt to new environments, find new resources, and resist diseases.
| 5. Can you provide an example of how variations in DNA can lead to differences among organisms? | |
Ans. One example of how variations in DNA can lead to differences among organisms is seen in the coloration of animals. Take, for instance, the variation in fur color in domestic cats. The gene responsible for fur color can have different versions or alleles. Some alleles may result in black fur, while others may lead to orange fur. These variations in the DNA sequence determine the expression of different traits, resulting in observable differences among individuals within the same species.
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