Answer: The correct answer is-
a. 0.3
Explanation-
As per the question, the frequency of blue eyes (which is a recessive trait) is 0.09.
Let us consider the genotype for it be 'qq' ( q representing recessive allele) that produces blue eyes.
According to equation of Hardy Weinberg principle-
p²+ 2pq+ q² = 1
where p² represent the genotype for dominant trait and q² is the genotype for recessive trait.
p represents frequency of dominant allele and q is recessive allele frequency.
q² = 0.09
q = √0.09
= 0.3
Thus, option a) 0.3 is the right answer.
