what is genetic drift? Explain how it provides diviersity in the population. ?

Explanation

1. Changes in the frequency of genes in small populations, due to accidents is known as " Genetic drift"
2. Let us condider a colour variation occurered in red colour beetles which are living on green coloued 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 beetle, 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 beetle sbut by chance a few beetles survived are mostly blue.
7. Agaion 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.