A population of snails exhibits two morphotypes - (i) dominant dark color [DD an Dd], and (ii) recessive light color [dd]. You observe in a population produces 25% homozygous dominant, 43% heterozygous, and 32% homozygous recessive. If there were 100 individuals in the population, how many dominant alleles are present in the entire population

Question

Biology

Gillian Peterson

31 March, 16:02

A population of snails exhibits two morphotypes - (i) dominant dark color [DD an Dd], and (ii) recessive light color [dd]. You observe in a population produces 25% homozygous dominant, 43% heterozygous, and 32% homozygous recessive. If there were 100 individuals in the population, how many dominant alleles are present in the entire population

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Riya Conner · Answer 1

To find the frequency of the dominant allele;

The following formula p + q = 1; p2 + 2pq + q = 1

DD (D2) = 25% = 0.25

D = ü0.25 = 0.5

The frequency of the dominant allele is therefore 0.5 or 50%. Therefore out of a population of 100 snails.

50/100*100 = 50

50 dominant allele are therefore present in the snail population.