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 **Hardy**–**Weinberg** 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 **Hardy**–**Weinberg 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.

## Which is most likely to occur in a population in Hardy-Weinberg equilibrium?

The answer to your question is, **Random mating**.

## 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 q ^{2}** 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.