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## How is the Hardy-Weinberg hypothesis the null hypothesis explain?

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.

## What is Hardy-Weinberg model and why is it a null model?

The Hardy–Weinberg model serves as a null **model in population genetics**, telling us what happens to allele frequencies and genotype frequencies when no evolutionary processes—natural selection, mutation, nonrandom mating, migration, and genetic drift—are operating. … Natural selection can take on various forms.

## What does the Hardy-Weinberg model show?

The Hardy-Weinberg principle states that a population’s allele and genotype frequencies will remain constant in the absence of evolutionary mechanisms. Ultimately, the Hardy-Weinberg principle models a population without evolution under the following conditions: **no mutations**. **no immigration/emigration**.

## Why does Hardy-Weinberg Equilibrium function as a null hypothesis?

The Hardy-Weinberg Equilibrium can be used as a null hypothesis, compared to values from a real population, to **describe statistically significant deviations from the Equilibrium**. If the deivation is significant, then the gene frequencies are changing and thus, evolution is occurring.

## How does Hardy-Weinberg calculate allele frequencies?

To calculate the allelic frequencies we simply **divide the number of S or F alleles by the total number of alleles**: 94/128 = 0.734 = p = frequency of the S allele, and 34/128 = 0.266 = q = frequency of the F allele.

## What are the 5 principles of the Hardy-Weinberg Equilibrium?

There are five basic Hardy-Weinberg assumptions: **no mutation, random mating, no gene flow, infinite population size, and no selection**.

## What is the null model in statistics?

In mathematics, for example in the study of statistical properties of graphs, a null model is **type of random object that matches one specific object in some of its features**, or more generally satisfies a collection of constraints, but which is otherwise taken to be an unbiasedly random structure.

## Which statement best describes the Hardy-Weinberg principle?

Correct answer:

Explanation: By definition, the Hardy-Weinberg principle **states that genotype and allele frequencies will remain constant throughout generations**. In order for equilibrium to occur, there must be a large, randomly mating population with no selection, genetic drift, migration, or mutation.

## What is the point of the Hardy-Weinberg principle?

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**.

## Why is the Hardy-Weinberg equation useful?

is incredibly useful because it **describes mathematically the genetic product of a population in which all individuals are equally likely to survive and to produce surviving offspring**. Specifically, it calculates the genotype frequencies that will be observed in a population that is not evolving.

## How does Hardy-Weinberg show 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.

## What is the 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**.