Bio exam 1

_______________ is the ultimate source of genetic variation

Mutation

Which of the following agents of evolutionary change occurs when alleles move from one population to another? A) Gene flow B) Assortative mating C) Natural selection D) Mutations

A) Gene Flow

Evolutionary change within a population can result from which of the following? Select all that apply... A) Natural selection B) Migration C) Mutations D) Experience

A) Natural selection B) Migration C) Mutations

What is gene flow? A) The movement of alleles into or out of a population. B) The accumulation of mutations in a gene over time. C) The change from one allele to another. D) The increased survival of individuals with beneficial alleles.

A) The movement of alleles into or out of a population

Evolution can result from any process that changes the ______ composition of a population A) genetic B) age C) male/female D) habitat

A) genetic

The amount of genetic variation present in naturally occurring populations is A) significant. B) very little. C) insignificant. D) practically nonexistent.

A) significant

Which evolutionary mechanism changes genotype frequencies but does not change allele frequencies? A) Migration B) Natural selection C) Assortative mating D) Genetic drift

Assorctative mating

What is the ultimate source of all new alleles? A) Genetic drift B) Natural selection C) Nonrandom mating D) Mutation

C) Mutation

Which of the following is true of evolutionary forces in natural populations? A) Evolutionary forces have no affect on allele frequencies in natural populations B) Evolutionary forces can alter allele frequencies in natural populations

Evolutionary forces can alter allele frequencies in natural populations

The processes that lead to evolutionary change are mutations, natural selection, ____________ drift, gene flow and ____________ mating.

Genetic drift Nonrandom mating

True or false: Genetic drift, mutations, and nonrandom mating are three agents that can act to produce evolutionary changes in a population.

True There are 5 agents

According to the theory of blending Inheritance, offspring were expected to be phenotypically ____________ relative to their parents, which would dilute any new genetic variants.

intermediate