1. What happens to the within-group and between-group genetic variation of the population when gene flow...
1. What happens to the within-group and between-group genetic variation of the population when gene flow occurs in the population?
2. What happens to the within-group and between-group genetic variation of the population when genetic drift occurs in the population?
3. When only one type of allele at a locus is found for a gene, what is this called?
4. What happens to a genetic variation within a population when natural selection is acting on a population?
5. What happens to a genetic variation between populations when natural selection is acting on only one of the populations?
Homework Answers
1. What happens to the within-group and between-group genetic variation of the population when gene flow occurs in the population?
Ans: The within-group genetic variation is increased when there is gene flow in the population and the between-group genetic variation is decreased when there is gene flow in the population. This is primarily because gene flow depends on the physical proximity of the groups or we can even say the physical proximity of the populations.
2. What happens to the within-group and between-group genetic variation of the population when genetic drift occurs in the population?
Ans: Genetic drift is one of the factors that cause gene pools to change over a period of time. Genetic drift can reduce the within-group genetic variation and bring about a loss of genetic variation, especially when there is a population bottleneck. This implies that when genetic drift occurs in the population, it increases the between-group genetic variation.
3. When only one type of allele at a locus is found for a gene, what is this called?
Ans: When only one type of allele is found at a locus for a gene, the genotype of that gene is called a homozygous genotype.
4. What happens to a genetic variation within a population when natural selection is acting on a population?
Ans: Natural selection within a population leads to an increase in the frequency of favored alleles over a period of time and thus when natural selection is acting on a population, it only reduces the genetic variation of the population.
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