AP BIOLOGY

Detailed explanation-1: -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. The gene pool of a population consists of all the copies of all the genes in that population.

Detailed explanation-2: -The allele frequency represents the incidence of a gene variant in a population. Alleles are variant forms of a gene that are located at the same position, or genetic locus, on a chromosome.

Detailed explanation-3: -Allele frequency is how often an allele occurs in a gene pool relative to the other alleles for that gene. Look at the example in the Table below. The population in the table has 100 members. In a sexually reproducing species, each member of the population has two copies of each gene.

Detailed explanation-4: -Genetic drift describes random fluctuations in the numbers of gene variants in a population. Genetic drift takes place when the occurrence of variant forms of a gene, called alleles, increases and decreases by chance over time. These variations in the presence of alleles are measured as changes in allele frequencies.

Detailed explanation-5: -A gene pool is the sum of all the alleles (variants of a gene) in a population.