Question

What do mean by gene flow and genetic drift?

Answer 1

Answer:

Gene flow-

• The migration of a group of individual (emigration and immigration) leads to changes in the allelic frequencies in the old and new population.

Genetic drift-

• When gene flow occurs due to chance event like natural calamities, it is known as genetic drift.
• When a group of individuals move into a new population, the allelic frequencies are so different in the new one such that they become a new species. This is founder effect and the original drifted population is known as founders.

Explanation: