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Key points: When a population is in Hardy-Weinberg equilibrium for a gene, it is not evolving, and allele frequencies will stay the same across generations. There are five basic Hardy-Weinberg assumptions: no mutation, random mating, no gene flow, infinite population size, and no selection.

## How do you know if a population is evolving using Hardy-Weinberg?

Comparing Generations

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.

## What does it mean when 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.

Evolution is measured at the population level with genetic equilibrium as the standard. According to the Hardy-Weinberg principle, both the ratios of genotypes and the frequency of alleles remain constant from one generation to the next in a sexually reproducing population, provided other conditions are stable.

## What are the evolutionary implications of the Hardy-Weinberg principle?

Evolutionary Implications of the Hardy-Weinberg Theorem

The Hardy-Weinberg Theorem demonstrates that Mendelian loci segregating for multiple alleles in diploid populations will retain predictable levels of genetic variation in the absence of forces that change allele frequencies.

## Why is population not in Hardy-Weinberg equilibrium?

If the allele frequencies after one round of random mating change at all from the original frequencies, the population is not in Hardy-Weinberg equilibrium and evolution has occurred within the population.

## What happens when a population is 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.

## Do you think population stay in genetic equilibrium?

The Hardy-Weinberg model states that a population will remain at genetic equilibrium as long as five conditions are met: (1) No change in the DNA sequence, (2) No migration, (3) A very large population size, (4) Random mating, and (5) No natural selection.

## Which Hardy-Weinberg condition is affected by population size?

Genetic Drift

A very large population, one of infinite size, is required for Hardy-Weinberg equilibrium. This condition is needed in order to combat the impact of genetic drift. Genetic drift is described as a change in the allele frequencies of a population that occurs by chance and not by natural selection.

## Why is Hardy-Weinberg equilibrium such a useful concept in population genetics and evolution?

The genetic variation of natural populations is constantly changing from genetic drift, mutation, migration, and natural and sexual selection. The Hardy-Weinberg principle gives scientists a mathematical baseline of a non-evolving population to which they can compare evolving populations.

## What information does Hardy-Weinberg provide about populations that are in equilibrium check all that apply?

The conditions to maintain the Hardy-Weinberg equilibrium are: no mutation, no gene flow, large population size, random mating, and no natural selection. The Hardy-Weinberg equilibrium can be disrupted by deviations from any of its five main underlying conditions.

## Which assumption must be met for a population to be in Hardy-Weinberg equilibrium for a specific gene?

The five assumptions of Hardy-Weinberg equilibrium are a large population size, no natural selection, no mutation rate, no genetic drift, and random mating.