Mutation genetic recombination and lateral gene transfer are

Mutation, genetic recombination and lateral gene transfer are sources of Genetic variation

What combines with the movement of chromosomes to account for genetic recombination during meiosis? Crossing over

How many phenotypes will a single-gene trait w/ two alleles have (simple dominance) have? two

How do the allele frequencies change during genetic drift? by chance

What is it called when the allele frequencies remain the same? Genetic equilibrium

What are organisms called when they can mate and produce reproductive offspring? species

What do you know about two species that share many of the same genes? They are closely related

How do you define the gene pool? Genes carried by all members of a particular population

What is the allele frequency if that allele makes up ¼ of the population? 25%

Natural selection acts directly on phenotypes or genotypes? phenotypes

What shape best illustrates polygenic inheritance? Bell curve

What selection is illustrated when only one end of the curve has increased fitness? Directional selection

What selection is illustrated by the center of the curve demonstrates increased fitness? Stabilizing selection

What has occurred when both ends of the curve have the greatest fitness? Disruptive fitness

What are some examples of geographic isolation Ocean, mountains, rivers, etc.

Organisms don’t reproduce because they mate at different times of the day/year/etc. ? Temporal

Organisms don’t reproduce because they have different mating dances/songs/rituals. ? Behavioral

What is a good (Darwin) example of speciation finch

Temporal, behavioral, and geographic can lead to this (______) which can cause speciation reproductive isolation

What drove the selection of beak size on the Galapagos? food