A population of alleles must meet five rules in order to be considered “in equilibrium”: 1) No gene mutations may occur and therefore allele changes do not occur. 2) There must be no migration of individuals either into or out of the population. 3) Random mating must occur, meaning individuals mate by chance.

## What conditions are needed for a population to be in Hardy-Weinberg equilibrium?

**In order for a population to be in Hardy-Weinberg equilibrium, or a non-evolving state, it must meet five major assumptions:**

- No mutation. No new alleles are generated by mutation, nor are genes duplicated or deleted.
- Random mating. …
- No gene flow. …
- Very large population size. …
- No natural selection.

## What does it mean if a population is in Hardy-Weinberg equilibrium?

The Hardy-Weinberg equilibrium is a **principle stating that the genetic variation in a population will remain constant from one generation to the next in the absence of disturbing factors**. … For instance, mutations disrupt the equilibrium of allele frequencies by introducing new alleles into a population.

## What does it mean for a population to be in Hardy-Weinberg equilibrium quizlet?

Hardy-Weinberg equilibrium: **the condition in which both allele and genotype frequencies in a population remain constant from generation to generation unless specific disturbances occur**.

## How do you know if it’s 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.

## Which factor does not affect Hardy-Weinberg equilibrium?

According to the Hardy Weinberg law, the allele and genotype frequencies in a population remain constant under absence of factors responsible for evolution. These factors are namely **mutation, recombination, gene migration, genetic drift and natural selection**.

## 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 Hardy-Weinberg equilibrium considered a null hypothesis?

The Chi-Square test for Hardy-Weinberg equilibrium assumes the “null hypothesis” – that is, the **observed genotype frequencies are not significantly different from those predicted for a population in equilibrium**. … This means that one may expect a Chi-Square of this value to occur by chance in 5% of genotype comparisons.

## 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.