Question

Define founder effect.

Answer 1

Definition of founder effect 

: the effect on the resulting gene pool that occurs when a new isolated population is founded by a small number of individuals possessing limited genetic variation relative to the larger population from which they have migrated

Answer 2

${\huge{Founder\: effect}}$

It is the phenomenon that occurs when a small group of organisms becomes isolated from a larger population and becomes so genetically different from the original population that they become a new population altogether.

The smaller the population higher are the chances of the founder effect.