Three different alleles (b1, b2, and b3) at the b locus exist in a hypothetical population of juniper trees.If the frequency of b1 is 0.4, what can be said about the frequency of b3?
A) It cannot be less than 0.4.
B) It cannot be greater than 0.6.
C) It is 0.3.
D) It is 0.
E) More information is required to answer this question.

Question

Quizplus · Accepted Answer

Since there are only three alleles at the b locus, the sum of their frequencies must add up to 1. Therefore, the frequency of b3 would be 1 - frequency of b1 - frequency of b2. Since we don't have any information about the frequency of b2, we can only say that b3 cannot be greater than 0.6 (if b2 had a frequency of 0).

Three Different Alleles (B1, B2, and B3) at the B