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 does p2 represent in the Hardy Weinberg formula?

In the equation, p^{2} represents **the frequency of the homozygous genotype AA**, q^{2} represents the frequency of the homozygous genotype aa, and 2pq represents the frequency of the heterozygous genotype Aa.

## Is P Q 1 always true?

Notice that p and q sum to 1 -> 0.7 + 0.3 = 1. This is **always true if there are only two alleles**. A good check on your math is to calculate these independently of each other and check that they sum to 1.

## Why is the probability of DD equal to 2 PQ?

Dd is equal to 2pq **because there are two ways to be heterozygous in a cross as illustrated in the Punnet square below**. p represents the frequency of the dominant allele and q represents the frequency of the recessive allele.

## How do you find P and Q in Hardy Weinberg?

To find q, simply **take the square root of 0.09 to get 0.3**. Since p = 1 – 0.3, then p must equal 0.7. 2pq = 2 (0.7 x 0.3) = 0.42 = 42% of the population are heterozygotes (carriers).

…

- The frequency of the recessive allele. …
- The frequency of the dominant allele. …
- The frequency of heterozygous individuals.

## What do PQ p2 2pq and q2 represent?

p2 +2pq + q2 = 1 Where p2 represents the frequency of the homozygous dominant genotype, q2 represents **the frequency of the recessive genotype** and 2pq is the frequency of the heterozygous genotype.

## Why is there a 2 in 2pq?

The term p2 represents **the frequency of dominant homozygotes (AA)** and the term q2 represents the frequency of recessive homozygotes (aa). p represents the allele frequency of allele A, and q represents the allele frequency of the allele a.

## Why is P and Q 1?

Because there are only two possible alleles, we can say that the frequency of p and q together represent **100% of the alleles** in the population (p+q=1).

## Why is Model 1 labeled selective mating?

Why is Model 1 labeled “Selective Mating”?-It is labeled selective mating **because they specifically selected beatles who were homozygousrecessive and heterozygous and mated them with each other**.

## What is the probability of DD?

So for parents who both have genotype Dd, there is a **25%** probability that their offspring is DD, a 25% probability that the offspring is dd, and a 50% probability that the offspring is Dd.

## What is the phenotype frequency?

Relative phenotype frequency is **the number of individuals in a population that have a specific observable trait or phenotype**. … Relative genotype frequency and relative allele frequency are the most important measures of genetic variation.