# How can the Hardy Weinberg be used to determine whether a population is evolving?

Contents

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. … If the assumptions are not met for a gene, the population may evolve for that gene (the gene’s allele frequencies may change).

## How can the Hardy-Weinberg equilibrium principle be used to determine if evolution has occurred?

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.

## Why is the Hardy-Weinberg equation useful in determining whether a species is evolving?

Importance: The HardyWeinberg model enables us to compare a population’s actual genetic structure over time with the genetic structure we would expect if the population were in HardyWeinberg equilibrium (i.e., not evolving).

## What can Hardy-Weinberg be used to predict?

The Hardy-Weinberg equation is a mathematical equation that can be used to calculate the genetic variation of a population at equilibrium. … If the p and q allele frequencies are known, then the frequencies of the three genotypes may be calculated using the Hardy-Weinberg equation.

## What are the factors affecting Hardy-Weinberg equilibrium?

-Factors affecting the Hardy-Weinberg equilibrium are:

• Mutations: – These are sudden, large, and inheritable changes in the genetic material can occur in all directions. …
• Recombinations during Sexual Reproduction: …
• Genetic Drift: …
• Gene migration:

## Which of the following factors 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.

## Why is Hardy-Weinberg equilibrium not realistic?

The Hardy-Weinberg equilibrium can be disturbed by a number of forces, including mutations, natural selection, nonrandom mating, genetic drift, and gene flow. … Because all of these disruptive forces commonly occur in nature, the Hardy-Weinberg equilibrium rarely applies in reality.

## Why is random mating important to Hardy-Weinberg?

If allele frequencies differ between the sexes, it takes two generations of random mating to attain Hardy-Weinberg equilibrium. Sex-linked loci require multiple generations to attain equilibrium because one sex has two copies of the gene and the other sex has only one.

## How do you calculate Hardy-Weinberg P and Q?

To determine q, which is the frequency of the recessive allele in the population, simply take the square root of q2 which works out to be 0.632 (i.e. 0.632 x 0.632 = 0.4). So, q = 0.63. Since p + q = 1, then p must be 1 – 0.63 = 0.37.

## What is genetic drift example?

Genetic drift is a change in the frequency of an allele within a population over time. A population of rabbits can have brown fur and white fur with brown fur being the dominant allele. … By random chance, the offspring may all be brown and this could reduce or eliminate the allele for white fur.

THIS IS INTERESTING:  Quick Answer: How are alleles removed from a population? 