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 85 of 100 organisms are green, what is p?

A. 0.92
B. 0.08
C. 0.85
D. 0.15

Answer 1

100-85=15, 15/100=0.15

Answer 2

Answer:

The answer is p=0.08

Explanation:

q is the allelic frecuency for the recessive allele

As 85 of 100 organisms are green (they are qq, the frecuency of homozygous recessive individuals):

qq= 85/100= 0.85

q= $\sqrt{0.85}$= 0.92

Then, the sum of probabilities is equal to 1, so:

p + q = 1

p= 1 - q= 1-0.92= 0.08

p is the frecuency for dominant allele and it is equal to 0.08.