Answer:
Frequency of black allele is

Frequency of brown allele is

Step-by-step explanation:
As per Hardy-Weinberg equation,
Frequency of the homozygous genotype is represented by AA and aa
Frequency of the heterozygous genotype is represented by Aa
In the Hardy-Weinberg mathematical equation
Frequency of AA is represented by

Frequency of AA is represented by

Frequency of AA is represented by

And the mathematical equation is as follows -

Substituting the given values in above equation we get

Also, sum of the allele frequencies for all the alleles at the locus is equal to 1 which means

Frequency of black allele is

Frequency of brown allele is
