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# calculate the genotype frequencies

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Please help with the following problem.

If the frequency of the dominant phenotypes (AA + Aa) is 0.8 and the population is in Hardy-Weinberg equilibrium, can you calculate the allele frequencies? Can you calculate the genotype frequencies? Show your calculations.

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https://brainmass.com/biology/genetics/hardy-weinberg-equilibrium-question-370952

#### Solution Preview

Problem: If the frequency of the dominant phenotypes (AA + Aa) is 0.8 and the population is in Hardy-Weinberg equilibrium, can you calculate the allele frequencies? Can you calculate the genotype frequencies?

Attached you will find a word document that explains what the Hardy Weinberg equation is and how you use it to find the answer to your question.

In order to answer this questions you first need to understand Hardy-Weinburg equilibrium. This means that if a population is in equilibrium then the frequency (percentage) of the alleles in the population will not change over time. The equation for Hardy Weinberg is: p2 +2pq + q2 = 1. ...

#### Solution Summary

This posting offers help with calculating genotype frequencies. Step by step calculations are given with explanations.

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