What is genetic drift? Explain how it provides diversity in the popula

1.	What is genetic drift? Explain how it provides diversity in the population.
Answer» 1. Changes in the frequency of genes in small populations, due to accidents is known as “Genetic drift”.’ 2. Let us consider a colour variation occurred in red colour beetles which are living on green coloured leaves of bushes. 3. It results in “blue” colour beetles instead of ‘red’ colour beetles and passed its colour to its progeny. 4. Initially in the population, there are few blue beetles, but most are red. 5. Imagine at this point, an elephant comes by and stamps on the bushes where the beetles live. 6. This kills most of the beetles but by chance a few beetles survived are mostly blue. 7. Again the beetle population slowly increases, but in the beetle population most of them are in blue colour. 8. Thus genetic drift provides diversity in the population.

What is genetic drift? Explain how it provides diversity in the population.

Answer»

1. Changes in the frequency of genes in small populations, due to accidents is known as “Genetic drift”.’

2. Let us consider a colour variation occurred in red colour beetles which are living on green coloured leaves of bushes.

3. It results in “blue” colour beetles instead of ‘red’ colour beetles and passed its colour to its progeny.

4. Initially in the population, there are few blue beetles, but most are red.

5. Imagine at this point, an elephant comes by and stamps on the bushes where the beetles live.

6. This kills most of the beetles but by chance a few beetles survived are mostly blue.

7. Again the beetle population slowly increases, but in the beetle population most of them are in blue colour. 8. Thus genetic drift provides diversity in the population.

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