What is the answer and why? Question 10 0.7 pts The colors of individuals in a s

Question

What is the answer and why?

Question 10 0.7 pts The colors of individuals in a snail population are determined by a single autosomal locus. A 1 A 1 homozygotes are red, A 1A 2 heterozygotes are pink, and A A 2 homozygotes are white. Genotypic fitnesses are as follows: w A1A1 0.5; WA1A10 WA2A2 0.75. At equilibrium, O the population contains only A 1 A 2 heterozygotes. e both alleles are maintained in the population, and allele A 2 is more common than allele A 1 the population is fixed for allele A 2 O both alleles are cqually frequent. O both alleles are maintained in the population, and allele A is more common than allele A 2.

Explanation / Answer

Question:

The colors of individuals in a snail population are determined by a single autosomal locus. A1A1 homozygotes are red, A1A2 heterozygotes are pink, and A2A2 homozygotes are white. Genotypic fitnesses are as follows: wA1A1 = 0.5; wA1A2 = 1.0; wA2A2 = 0.75.

Answer:

At equilibrium, both alleles are maintained in the population, and allele A2 is more common than allele A1.

Explanation:

According to law of natural selection, the alleles who have greater fitness will contribute more to the next generation and their frequency in population is going to increase in course of evolution. The allelic fitness of A2 here is (A2A2: 0.75 + A1A2:1.0/2=1.25) maximum so this allele definitely going to be more common than A1 (A1A1:0.5 + A1A2:1.0/2=1.0).

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