Question

Consider the allelic frequency of the alleles of the bigmouth gene in a population of 10 people. In this population, 2 have the genotype B8, 3 have the genotype bb, and the rest are heterozygotes. What is the frequency q of the recessive allele b?

A. q 0.55
B. q 0.50
C. q 0.45
D. q 0.2
E. The allele frequencies can only be determined if the population is in Hardy-Weinberg equilibrium

Answer 1

A. q 0.55

Step-by-step explanation:

Frequency of genotye "BB"
`= (2)/(10)`
`=0.2`

Frequency of genotye "bb"
`= (3)/(10)`
`=0.3`

Frequency of genotye "Bb"
`= (10-(2+3))/(10)`
`=0.5`

Frequency of bb is represented as "
`q^(2)`" as per Hardy Weinberg's principle.

Thus, frequency q of the recessive allele b is represented by

`q= \sqrt{q^(2) } \\q = √(0.3) \\q = 0.547\\q=0.55`

Hence, option A is correct.