Biology Flashcards

Front 1

Behavioral isolation

Back 1

form of reproductive isolation in which two populations develop differences in courtship rituals of other behaviors that prevent them from breeding

Front 2

Biogeography

Back 2

study of past and present distribution of organisms

Front 3

Bottleneck effect

Back 3

a change in allele frequency following a dramatic reduction in the size of a population

Front 4

Directional selection

Back 4

form of natural selection in which individuals at one end of a distribution curve have higher fitness than individuals in the middle or at the other end of the curve

Front 5

Disruptive selection

Back 5

natural selection in which individuals at the upper and lower ends of the curve have higher fitness than individuals near the middle of the curve

Front 6

Evolution

Back 6

change over time; the process by which modern organisms have descended from ancient organisms

Front 7

Fitness

Back 7

how well and organism can survive and reproduce in its environment

Front 8

Fossil

Back 8

preserved remains or traces of ancient organisms

Front 9

Founder effect

Back 9

change in allele frequencies as a result of the migration of a small subgroup of population

Front 10

Gene pool

Back 10

all the genes, including all the different alleles for each gene, that are present in a population at any one time

Front 11

Genetic drift

Back 11

random change in allele frequency caused by a series of chance occurrences that cause an allele to become more or less common in a population

Front 12

Genetic equilibrium

Back 12

situation in which allele frequencies in a population remain in the same