In the year 2500, five male space colonists and five female space colonists (all unrelated to each other) settle on an uninhabited Earthlike planet in the Andromeda galaxy. The colonists and their offspring randomly mate for generations. All ten of the original colonists had free earlobes, and two were heterozygous for that trait. The allele for free earlobes is dominant to the allele for attached earlobes.
-Which of these is closest to the allele frequency in the founding population?
A) 0.1 a, 0.9 A
B) 0.2 a, 0.8 A
C) 0.5 a, 0.5 A
D) 0.8 a, 0.2 A
E) 0.4 a, 0.6 A

Question

Quizplus · Accepted Answer

The allele frequency for the dominant allele (A) is 0.9, and the allele frequency for the recessive allele (a) is 0.1. This is because two of the original colonists were heterozygous for the trait, meaning that they had one copy of the dominant allele and one copy of the recessive allele. The other eight colonists were homozygous for the dominant allele, meaning that they had two copies of the dominant allele.

In the Year 2500, Five Male Space Colonists and Five