Question

Purple spots is a homozygous recessive genetic trait in martians (assume their hereditary patterns match that of eukaryotes on earth). If 25 in 10,000 martian babies have spots, what are the expected frequencies of the dominant S and recessive s alleles in a population in Hardy-Weinberg equilibrium.
Select one:

a. S = 0.9500, s = 0.0500
b. S = 0.0005, s = 0.9995
c. S = 0.9605, s = 0.0395
d. S = 0.0005, s = 0.0025

Answer 1

Answer:

a. S = 0.9500, s = 0.0500

Explanation:

if 25 in 10000 have spots, it means there are 500 s allele in the population and 9500 S allele.

the allele frequency is thus;

S = 9500/10000 =0.9500

s = 500/10000 = 0.0500