4-3 Vocab Review

Front

Define phenotype:

Back

Observable traits

Front

Define directional selection:

Back

An extreme phenotype is favored over other phenotypes.

Front

Define stabilizing selection:

Back

Intermediate forms of a trait are favored; extreme values are selected against.

Front

Disruptive selection: Extreme forms of a trait are favored over intermediates, dividing the population into two distinct phenotypes.

Back

Extreme forms of a trait are favored over intermediate values and the population is divided into two distinct phenotypes.

Front

Define macroevolution:

Back

Large scale evolution leading to speciation.

Front

Define microevolution:

Back

Small scale evolution within a species.

Front

Define species:

Back

A group of organisms with similar traits and can interbreed.

Front

Define gene pool:

Back

All genes in a population tallied together.

Front

Define speciation:

Back

When a new species forms

Front

Allopatric speciation:

Back

Evolution of a new species when some members become geographically separated.