3-7 Review

Define genetic variation:

• Range of similarities in evolutionary pathways

• Range of similarities in traits across different species

• Range of differences in DNA within a population

• Range of differences in mutations within a species

Define gene pool:

• All of the traits in a population tallied together

• All of the genes in a population tallied together

• The traits from some individuals tallied together

• The genes from some individuals tallied together

An inherited trait that is different than either parent is called a:

• Adaptation

• Mutation

• Deletion

• Ancestor

Define recombination:

• When DNA is moved from one chromosome to another during meiosis

• When DNA is combined with new DNA

• When DNA is added to a chromosome

• When DNA is removed from a chromosome

Define sexual selection:

• Traits become more frequent in a population if they help an organism survive and reproduce in the environment

• Traits become more frequent in a population when humans selectively breed for preferred traits

• Traits become more frequent in a population when mates select for attractive traits

• Traits become less frequent in a population when individuals randomly die off

Define gene flow:

• The movement of alleles into a gene pool

• The movement of alleles out of a gene pool

• Both A and B

• None of the above

Define genetic drift:

• When the proportions of alleles within a gene pool randomly change

• When the proportions of alleles within a gene pool change due to natural selection

• When the proportions of alleles within a gene pool change due to sexual selection

• When the proportions of alleles within a gene pool never change

Define founder effect:

• When a few individuals from one population leave and found a new population elsewhere

• When the size of a population is quickly reduced and the surviving population is much smaller

Define bottleneck effect:

• When a few individuals from one population leave and found a new population elsewhere

• When the size of a population is quickly reduced and the surviving population is much smaller

Define comparative morphology:

• Compares the structures in an organism with other species

• Compares the physical abilities of an organism with other species

• Compares the behavior of an organism with other species

• Compares the diet of an organism with other species