Module 14 Lesson 3 Vocab

States that allelic frequencies in populations stay the same unless they are affected by a factor that causes change.

• Founder effect

• Genetic drift

• Hardy-Weinberg principle

• Directional Selection

Random change in allelic frequencies in a population.

• genetic drift

• bottleneck

• stabilizing selection

• directional selection

Most common form of natural selection in which organisms with extreme expressions of a trait are removed.

• sexual selection

• disruptive selection

• directional selection

• stabilizing selection

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-4

Shift of a population toward an extreme version of a beneficial trait.

• disruptive selection

• directional selection

• sexual selection

• genetic drift

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-4

Process in which individuals with average traits are removed, creating two populations with extreme traits.

• bottleneck

• genetic drift

• sexual selection

• disruptive selection

Tags

NGSS.HS-LS4-4

Change in the frequency of a trait based on competition for a mate.

• sexual selection

• disruptive selection

• directional selection

• genetic drift

Tags

NGSS.HS-LS4-4

Factor that prevents individuals from different species from mating; operates before fertilization.

• allopatric speciation

• post zygotic isolating mechanism

• pre zygotic isolating mechanism

• sympatric speciation

Factor that prevents a hybrid zygote from developing, or prevents hybrid offspring from reproducing; operates after fertilization.

• sympatric speciation

• allopatric speciation

• pre zygotic isolating mechanism

• postzygotic isolating mechanism

Occurs when a population divided by a geographic barrier evolves into two or more populations unable to interbreed.

• sympatric speciation

• allopatric speciation

• adaptive radiation

• genetic drift

Tags

NGSS.HS-LS4-5

Occurs when a species evolves into a new species in an area without a geographic barrier.

• allopatric speciation

• gradualism

• sympatric speciation

• adaptive radiation