please explain step by step :) 3. You are studying a population of Darwin\'s fin

Question

please explain step by step :)

3. You are studying a population of Darwin's finches. You genotype a large group of hatchlings at the A locus and then re-genotype them as adults. You observe the following genotype frequencies: Hatchlings 0.10 0.30 0.60 Adults: 0.20 0.40 0.40 a) Is the hatchling population at Hardy-Weinberg equilibrium (Yes/No)? Show your work to receive full credit. (The math is simplest ifyou use fractions.) b) Calculate the selection coefficients for the genotypes based on these data. The first step is to divide adult genotype frequency by hatchling genotype frequency for each all numbers by the highest fitness value. (Use fractions.) c) Over time, would you expect the A locus to remain polymorphic (Yes/No)? If not, what is the expected outcome? What type of selection is this?

Explanation / Answer

Answer:

Based on the given information:

1) Is the Hatchling population at Hardy Weinberg Equilibrium?

2) Calculate the Selection Coefficients for the genotypes based on these data.

To calculate the selection coefficient, the adult genotype frequency is divided by hatchlings genotype frequency to determine fitness. All values are divided by highest value (2) to calculate relative fitness values.

3) Over time would you expect the A locus to remain polymorphic?

Directional selection will ultimately lead to the fixation of the selectively favored allele. Population will evolve until genetic variance is exhausted.

A1A1 A1A2 A2A2 Hatchlings 0.1 0.3 0.6 Adults 0.2 0.4 0.4

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