# AP BIOLOGY

## EVOLUTION

### HARDY WEINBERG EQUILIBRIUM

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A population’s recessive allele frequency 25%. What is the frequency of the heterozygous genotype?
 A 0.5625 B 0.375 C 0.0625 D 0.25
Explanation:

Detailed explanation-1: -The frequency of heterozygous individuals. Answer: The frequency of heterozygous individuals is equal to 2pq. In this case, 2pq equals 0.32, which means that the frequency of individuals heterozygous for this gene is equal to 32% (i.e. 2 (0.8)(0.2) = 0.32).

Detailed explanation-2: -So, the correct answer is ‘0.64’

Detailed explanation-3: -In the question, the genotype frequency of recessive population is (q2) = (16% or 0.16). Hence, frequency of recessive allele = q = 0.16 = 0.4.

Detailed explanation-4: -As given, the frequency of a recessive phenotype is 25% (tt). So 25% is the phenotypic ratio of 3:1 of the F2 generation of a monohybrid cross. Therefore, the frequency of the dominant phenotype will be 75%.

There is 1 question to complete.