Biology 2 Exam 1

Front 1

Evolution

Back 1

Genetic and phenotypic changes occurring in populations of organisms through time, generally resulting in increased adaptation for continued survival.

Front 2

Evolution Example

Back 2

The evolution of shell shape oysters.

Front 3

Bottleneck Effect-Genetic Drift

Back 3

Evolution by chance process. * Parent population->Bottleneck (drastic reduction in population)->Surviving individuals->next generation.

Front 4

Species

Back 4

A group of morphologically similar ( common gene pool ) organisms that are capable of interbreeding and producing fertile offspring and reproductively isolated.

Front 5

Microevolution vs Macroevolution

Back 5

Microevolution-Deals primarily with the process of evolution or change.

Macroevolution- Deals with the patterns of diversity of life.

Front 6

Macroevolution

Back 6

1. Refers to large-scale patterns, trends, and rates of change among higher-taxa groupings of species.

2. Is driven by Microevolutionary processes such as mutation, natural selection, and genetic drift change allele frequencies in reproductively isolated populations.

Front 7

Lethal Mutation

Back 7

An expression of a gene that results in death.

Front 8

Mutation

Back 8

A change in DNA; provides the ultimate source for phenotypic variation

Front 9

Harmful Mutation

Back 9

Those that bestow survival disadvantages.

Front 10

Neutral Mutations

Back 10

Those that have no effect on survival and reproductions.

Front 11

Beneficial Mutations

Back 11

Those that bestow survival advantages.