The graph below shows the change in gene frequency of the...

The graph below shows the change in gene frequency of the two alleles of a gene: A and a. The population being studies has no emigration or immigration. Which type of evolution is likely occurring here and is the allele selected for, neutral, or selected against by natural selection? a. non-random mating; both alleles are favored b. gene flow; allele A is favored c. genetic drift; both alleles are neutral d. natural selection; allele a is not favored

The graph below shows the change in gene frequency of the two alleles of a gene: A and a. The population being studies has no emigration or immigration. Which type of evolution is likely occurring here and is the allele selected for, neutral, or selected against by natural selection?
a. non-random mating; both alleles are favored
b. gene flow; allele A is favored
c. genetic drift; both alleles are neutral
d. natural selection; allele a is not favored

Key Concepts

Natural Selection

Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring. This mechanism of evolution leads to an increase in the frequency of alleles that confer a survival or reproductive advantage, while alleles that are deleterious may decrease in frequency.

Genetic Drift

Genetic drift refers to random fluctuations in allele frequencies from one generation to the next, particularly in small populations. Unlike natural selection, genetic drift is not based on an allele's advantage or disadvantage, and it can lead to significant evolutionary changes by chance alone.

Gene Flow

Gene flow is the movement of alleles between populations through the migration of individuals or their gametes. It can introduce new alleles into a population and alter allele frequencies, thus playing a key role in the genetic structure and evolution of populations by increasing genetic diversity.

Non-random Mating

Non-random mating occurs when individuals in a population choose mates based on particular traits or genetic similarities rather than at random. This behavior can lead to changes in genotype frequencies, affecting the overall genetic structure of the population and potentially contributing to evolutionary change.

Allele Frequency

Allele frequency is the relative proportion of a specific allele among all allele copies in a population. It is a fundamental measure in population genetics used to assess how evolutionary processes such as natural selection, genetic drift, gene flow, and non-random mating influence genetic variation over time.

Transcript

Please give Ace some feedback