Question

Blue eyes are recessive in humans. If 20% of the population has blue eyes, what is the frequency of homozygous dominant individuals in this population?

a. 0.8
b. 0.45
c. 0.30
d. 0.55

Answer 1

The frequency of homozygous dominant individuals in this population is 0.55.

Step-by-step explanation:

According to Hardy-Weinberg Equilibrium,

p + q = 1

For the Homozygous recessive gene is given by ².

where, p represents the frequency of dominant gene.

q represents the frequency of recessive gene.

² = 20 % = 20 / 100 = 0.2

q =
`√(0.2)`

q = 0.45

p + q = 1

p = 1 - q

= 1 - 0.45

p = 0.55.