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## What is Q and P in biology?

The Hardy-Weinberg Law is an equation for calculating the frequencies of different alleles and genotypes in a population in genetic equilibrium and expressed by the formula p + q = 1 where **p is the frequency of the dominant allele and q is the frequency of the recessive allele**.

## What is P and Q in Hardy Weinberg?

The Hardy-Weinberg equation is a mathematical equation that can be used to calculate the genetic variation of a population at equilibrium. … where p is **the frequency of the “A” allele and q is the frequency of the “a” allele in the population**.

## What does the variable Q represent?

Mathematics usually uses letters from the end of the alphabet to represent variables. Economics however often uses the first letter of the item which varies to represent variables. Thus p is used for the variable price and q is used for **the variable quantity**.

## How do you find allele frequency from genotype frequencies?

To find the allele frequencies, we again look at each individual’s genotype, **count the number of copies of each allele, and divide by the total number of gene copies**.

## How do you find P and Q from genotype frequency?

To determine q, which is the frequency of the recessive allele in the population, simply take the square root of q^{2} which works out to be 0.632 (i.e. 0.632 x 0.632 = 0.4). So, q = 0.63. Since p + q = 1, then p must be **1 – 0.63 = 0.37**.

## How do you calculate P and Q?

We can calculate the values of p and q, in a representative sample of individuals from a population, by **simply counting the alleles and dividing by the total number of alleles examined**. For a given allele, homozygotes will count for twice as much as heterozygotes.

## Which allele is represented by the Q variable in the Hardy-Weinberg equation?

p represents the allele frequency of allele A, and q represents the **allele frequency of the allele a**.