Formally, evolution is a change in allele frequencies in a population over time, so a population in Hardy-Weinberg equilibrium is not evolving.

## How is Hardy-Weinberg equilibrium related to evolution?

The Hardy-Weinberg equilibrium principle describes **the unchanging frequency of alleles and genotypes in a stable, idealized population**. … In the absence of these evolutionary forces, the population would reach an equilibrium in one generation and maintain that equilibrium over successive generations.

## Why evolution Cannot happen if the Hardy-Weinberg equilibrium is true in a population?

Correct answer:

For this principle to hold true, **evolution must essentially be stopped**. The conditions to maintain the Hardy-Weinberg equilibrium are: no mutation, no gene flow, large population size, random mating, and no natural selection.

## How do you know if something is in Hardy-Weinberg equilibrium?

To know if a population is in Hardy-Weinberg Equilibrium scientists **have to observe at least two generations**. If the allele frequencies are the same for both generations then the population is in Hardy-Weinberg Equilibrium.

## Is there a way to mathematically calculate evolution?

The Hardy-Weinberg equation is a mathematical equation that can be used to calculate the genetic variation of a population at equilibrium.

## 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.

## What are the factors that affect Hardy-Weinberg equilibrium?

Among the five factors that are known to affect Hardy Weinberg equilibrium, three factors are **gene flow, genetic drift, and genetic recombination, Mutation, and Natural Selection** are the other two factors.

## 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.

## What will happen to the frequency of the recessive allele?

The answer is the frequency of the recessive allele **will increase**.

## What causes deviation from Hardy-Weinberg equilibrium?

Small Population Sizes: **Genetic Drift**

**In a small population, the sampling of gametes and fertilization to create zygotes causes random error in allele frequencies**. This results in a deviation from the Hardy-Weinberg Equilibrium. This deviation is larger at small sample sizes and smaller at large sample sizes.