Question

Populations are often small when they have just been founded by a group of individuals that have moved to a new location. The allele frequencies in the new populations are likely to be different from what they were in the source population. What is this called?

Group of answer choices

-Inbreeding depression

-Founder effect

-One-island migration

-Mutation-selection balance

Answer 1

The correct term for the described phenomenon when a new population's allele frequencies deviate from the source population due to a small number of founding individuals is the 'founder effect'.

Step-by-step explanation:

The phenomenon described in the question, where populations start small when they have just been founded by a group of individuals who moved to a new location and their allele frequencies are likely to be different from the source population, is called the founder effect. This occurs when the genetic structure changes to match that of the new population's founding individuals. An example of the founder effect can be seen in the Amish population, where certain gene mutations, such as those causing Ellis-van Creveld syndrome, are found at a high concentration due to the small number of immigrants that originally established the population.