A fly has two alleles for the color of its eyes. The green allele is recessive, and is represented by Q. The blue allele is dominant, and is represented by P. If 20 of 100 organisms are green, what is Q?

The value of Q is 0.44 if 20 organisms of 100 organisms are green.

Explanation:

Data given:

alleles for the color of eyes of fly:

blue allele = dominant represented by P

green allele = recessive, represented by Q

total number of organism = 100

number of recessive trait organism, = 20

Q =?

The allele frequency of the green eye is calculated as:

=

= 0.2

q =

q = 0.44

0.44 is the frequency of Q allele in the population.

Q is the homozygous recessive alleles in the population and its value is 0.44.