When a small section of a population establishes itself in a new area …

Question

When a small section of a population establishes itself in a new area and, by chance, has allele frequencies very different from the parent population, the resulting phenomenon is termed the:

Accepted Answer

A. {'text': 'Founder effect, a chance shift in a small migrant group', 'label': 'A'}

Sometimes, by chance, the allele frequencies in a migrant sub-population differ so sharply from the original that they form a different species. The original drifted population becomes founders and the phenomenon is called the founder effect.

Answer

{'text': 'Bottleneck effect, after random destruction of most members', 'label': 'B'}

Answer

{'text': 'Gene flow effect, from repeated migration between groups', 'label': 'C'}

Answer

{'text': 'Selection effect, from differential reproductive success', 'label': 'D'}