Answer: 0.34375
Explanation:
Given : Genetic diversity is measured in terms of allele frequencies .
Allele frequencies : The relative proportions of a specific allele in a gene pool. (1)
A population of 3,200 mice has 4,200 dominant G alleles and 2,200 recessive g alleles.
Combined alleles in gene pool= 4200+2200=6400
Then from (1), the frequency of recessive g alleles in the population will be proportion of recessive g alleles in gene pool :-

Hence, the frequency of recessive g alleles in the population= 0.34375