Consider a hypothetical fish whose scale color is controlled by one gene with tw

Question

Consider a hypothetical fish whose scale color is controlled by one gene with two alleles. The gene is inherited in an incomplete dominance pattern. In a wild population of 1000 of these fish, there are 625 with blue scales and genotype SBSB, 175 with green scales and genotype SBSY, and 200 with yellow scales and genotype SYSY.

What is the allele frequency of the SB gene and the SY gene?

What is the genotype frequency observed in this population for blue fish, for green fish, and for yellow fish?

What is the genotype frequency expected if the population follows Hardy Weinburg equilibrium for the blue, the green, and the yellow fish.

Explain why this fish population is, or is not in Hardy Weinburg equilibrium. If it is not in Hardy Weinburg equilibrium, what type of selection is likely occurring?

Explanation / Answer

genotype frequency SySy= q2= 200

allele frequency Sy= square root of q= 14.14

p= 1-q =

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