Q. What is it called when allele frequencies of a population remain constant?
In population genetics, the Hardy–Weinberg principle, also known as the Hardy–Weinberg equilibrium, model, theorem, or law, states that allele and genotype frequencies in a population will remain constant from generation to generation in the absence of other evolutionary influences.
Q. What factors cause change in allele frequencies?
From the theorem, we can infer factors that cause allele frequencies to change. These factors are the “forces of evolution.” There are four such forces: mutation, gene flow, genetic drift, and natural selection.
Table of Contents
- Q. What is it called when allele frequencies of a population remain constant?
- Q. What factors cause change in allele frequencies?
- Q. What are the factors that affect allele frequency and how they are affected?
- Q. When allele frequencies remain unchanged a population is in genetic equilibrium?
- Q. What does P represent what does Q represent p2 q2 and 2pq?
- Q. What are the 5 principles of the Hardy-Weinberg equilibrium?
- Q. What does 2pq mean frequency?
- Q. How do you calculate gene frequency?
- Q. What are the factors affecting gene frequency?
- Q. What is the best example of genetic drift?
- Q. Which of the following is an example of genetic drift in a population?
Q. What are the factors that affect allele frequency and how they are affected?
Answer : Five factors are known to affect allele frequency in populations i.e., Hardy-Weinberg equilibrium. These are gene migration or gene flow, genetic drift, mutation, genetic recombination and natural selection. Gene migration or gene flow – it is movement of alleles into a gene pool or out of a gene pool.
Q. When allele frequencies remain unchanged a population is in genetic equilibrium?
Genetic equilibrium occurs when there is no evolution within the population. In other words, the frequency of alleles (variants of a gene) will be the same from one generation to another. At genetic equilibrium, the gene or allele frequencies are stable—they do not change.
Q. What does P represent what does Q represent p2 q2 and 2pq?
In the equation, p2 represents the frequency of the homozygous genotype AA, q2 represents the frequency of the homozygous genotype aa, and 2pq represents the frequency of the heterozygous genotype Aa.
Q. 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.
Q. What does 2pq mean frequency?
heterozygous genotype
Q. How do you calculate gene frequency?
Allele frequency refers to how common an allele is in a population. It is determined by counting how many times the allele appears in the population then dividing by the total number of copies of the gene.
Q. What are the factors affecting gene frequency?
role in natural selection Gene frequencies tend to remain constant from generation to generation when disturbing factors are not present. Factors that disturb the natural equilibrium of gene frequencies include mutation, migration (or gene flow), random genetic drift, and natural selection.
Q. What is the best example of genetic drift?
Genetic Drift Examples A disease comes into the rabbit population and kills 98 of the rabbits. The only rabbits that are left are red and grey rabbits, simply by chance. The genes have thus “drifted” from 6 alleles to only 2. This is an example of a bottleneck effect.
Q. Which of the following is an example of genetic drift in a population?
A massive storm randomly kills many individuals in a population, changing the frequency of alleles in that population. Individuals from one population move and mate with members of a different population. All of these are examples of genetic drift.
