Freckles F are dominant to no freckles f If the frequency of

Freckles (F) are dominant to no freckles (f). If the frequency of F = p = 0.7 What is the frequency of the f allele? What are the frequencies of the genotypes in the population? What are the frequencies of the phenotypes in the population?

Solution

Answer:

Frequency of f allele

HARDY-WEINBERG Equilibrium

P+q =1

F=p=0.7

f=?

q=1-p

q=1-0.7 =0.3

Frequencies of genotypes in a population

FF, ff, 2Ff

p2 + 2pq + q2 = 1

p = frequency of the dominant allele in the population

q = frequency of the recessive allele in the population

p2 = percentage of homozygous dominant individuals

q2 = percentage of homozygous recessive individuals

2pq = percentage of heterozygous individuals

p2 = percentage of homozygous dominant individuals

FF = p^ 2 = (0.7) ^ 2 = 0.49

2pq = percentage of heterozygous individuals

2Ff= 2 (0.7) (0.3) =0.42

q2 = percentage of homozygous recessive individuals

ff= q^ 2=(0.3) ^ 2 =0.09

Frequencies of phenotypes in the population

Freckles= 75%

No freckles =25%