Find estimated genotypic frequency of the lethal hh genotype

Mexican hairless dogs are heterozygous (Hh), carrying a single copy of the dominant lethal allele. In a given population, the Hh genotypic frequency is 60% and the frequency of each homozygote is 20%. Assuming w = 1 for the Hh and hh dogs, what is the estimated genotypic frequency of the lethal HH genotype after reproduction?

A. 39%
B. 10%
C. 46%
D. 14%
E. 20%

 

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