Suppose a population is carrying a condition controlled by two alleles: R (dominant) and r (recessive). If the frequency of the r allele is 15%, and the frequency of the R allele is 85%, what will be the frequency of the RR genotype, assuming evolution is not occurring?

A. 72.25 percent

B. 2.25 percent

C. 12.75 percent

D. 25.5 percent

Question

Biology

Alisson Dunn

2 August, 03:47

Suppose a population is carrying a condition controlled by two alleles: R (dominant) and r (recessive). If the frequency of the r allele is 15%, and the frequency of the R allele is 85%, what will be the frequency of the RR genotype, assuming evolution is not occurring?

A. 72.25 percent

B. 2.25 percent

C. 12.75 percent

D. 25.5 percent

+1

Answers (2)

Know the Answer?

Isaiah Rowe · Answer 1

A. 72.25 percent

Explanation:

The frequency of a genotype is calculated by the product of multiplying allele frequencies.

The R allele has a frequency of 85% (0.85), so for a homozyguous individual RR:

f (R) * f (R) = 0.85 * 0.85 = 0.7725

0.7725 * 100 = 77.25%

It is concluded that the frequency for RR genotype is 77.25%.

Michelle Hubbard · Answer 2

A. Since the frequency of the R allele is 0.85, the frequency of the RR genotype would be 0.85^2 = 0.7225.