Question

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?

A.0.80
B.0.45
C.0.55
D.0.89

Answer 1

B. 0.45 is the answer

Answer 2

The correct answer would be B. 0.45

20 out of 100 organisms have green colored eyes. Thus, the percentage of homozygous recessive phenotype would be 20%.

Therefore, the value of q² = 20% = 0.20

Hence, the value of q =
`√(0.20)` = 0.447

Thus, the approximate value of q would be 0.45