AP BIOLOGY

Detailed explanation-1: -The biological sciences now generally define evolution as being the sum total of the genetically inherited changes in the individuals who are the members of a population’s gene pool. It is clear that the effects of evolution are felt by individuals, but it is the population as a whole that actually evolves.

Detailed explanation-2: -gene pool, sum of a population’s genetic material at a given time. The term typically is used in reference to a population made up of individuals of the same species and includes all genes and combinations of genes (sum of the alleles) in the population.

Detailed explanation-3: -Evolution is the process by which populations of organisms change over generations. Genetic variations underlie these changes.

Detailed explanation-4: -Genetic Drift. Genetic drift is the change in frequency of an existing gene variant in the population due to random chance. Genetic drift may cause gene variants to disappear completely and thereby reduce genetic variation. It could also cause initially rare alleles to become much more frequent, and even fixed.

Detailed explanation-5: –The gene pool is a fundamental concept for the study of genetic variation in populations: it is the sum total of all alleles in the breeding members of a population at a given time.