AP BIOLOGY

Detailed explanation-1: -Genetic variation within a population is measured according to the number of different alleles of all genes and the frequency with which they appear. Variation is high when there are many different allelic forms of all genes and when there are many different combinations of those alleles.

Detailed explanation-2: -The greater the hereditability of a population’s phenotypic variation, the more susceptible it is to the evolutionary forces that act on heritable variation. The diversity of alleles and genotypes within a population is called genetic variance .

Detailed explanation-3: -Genetic variation is the difference in DNA among individuals or the differences between populations. The multiple sources of genetic variation include mutation and genetic recombination. Mutations are the ultimate sources of genetic variation, but other mechanisms, such as genetic drift, contribute to it, as well.

Detailed explanation-4: -Microevolution and population genetics. Microevolution, or evolution on a small scale, is defined as a change in the frequency of gene variants, alleles, in a population over generations. The field of biology that studies allele frequencies in populations and how they change over time is called population genetics.

Detailed explanation-5: -Allele: one of the two copies of a genomic sequence present in (diploid) cells. Variant: a site where the genome you are looking at differs from a reference genome of that species.