Question

The frequency of a recessive allele in a large randomly mating population is 0.2.
What is the frequency of:
(a) The dominant allele?

Answer 1

p+q=1

P-frequency of dominant allele
Q-frequency of recessive allele

P=1-0.2

=0.8

so 0.8 would be frequency of dominant allele

Answer 2

p+q=1

P-frequency of dominant allele

Q-frequency of recessive allele

P=1-0.2

=0.8

Hope it will help