Quizs Ch 23 Notes Population Genetics

Causes of Microevolution: Genetic Drift

• Reduces genetic diversity due to changes in the gene pool of a small population by chance.

• Increases genetic diversity by introducing new alleles into the population.

• Eliminates all genetic variation in a population over time.

• Promotes adaptation to the environment through natural selection.

POPULATION

• A localized group of individuals belonging to the same species.

• A random collection of different species in an area.

• A group of individuals that can interbreed and produce fertile offspring.

• A collection of organisms that live in different habitats.

The cheetah population experienced a bottleneck during the last Ice Age, approximately 10,000 years ago, and more recently due to poaching. What is this an example of?

• Cheetah population bottleneck history.

• Cheetah population growth history.

• Cheetah population migration history.

• Cheetah population extinction history.

Animals with colorful plumage, antlers, and a lion's mane are examples of what?

• sexual dimorphisms, as the females lack these traits

• habitat adaptations

• mating rituals

• seasonal behaviors

4 ways natural selection acts on populations

• stabilizing selection

• directional selection

• disruptive (diversifying) selection

• artificial selection

SPECIES

• A group of populations whose individuals can interbreed and produce fertile, viable offspring.

• A classification of organisms based on their habitat.

• A type of organism that cannot reproduce.

• A collection of unrelated individuals living in the same area.

5 causes of microevolution

• natural selection

• genetic drift

• gene flow

• mutation

• nonrandom mating

The Amish community has a high number of individuals with Ellis-van Creveld syndrome, a form of dwarfism with polydactyly (6 fingers and toes). What is the term that explains this phenomenon?

• Founder Effect

• Genetic Drift

• Natural Selection

• Mutation

Sexual Dimorphisms

• Differences in appearance between males and females of the same species; due to sexual selection.

• The process by which species evolve to adapt to their environment.

• The study of how different species interact with each other.

• Variations in behavior between male and female animals.

What is this an example of?

• Stabilizing selection

• Directional selection

• Disruptive selection

• Sexual selection