Gene Flow Video

What is microevolution?

• • A) Evolution that happens over millions of years

• • B) Evolution expressed through a change in gene frequency over a short period

• • C) Evolution that results in the creation of new species

• • D) Evolution that only occurs in microorganisms

What is the gene pool?

• • A) A swimming pool for animals

• • B) The group of genes an individual has

• • C) The sum total of all genetic material in a population

• • D) A collection of all DNA types in the world

What process causes some alleles to become more common over generations?

• • Gene flow

• Bottleneck effect

• Genetic drift

• Natural selection

What is genetic drift?

• A) A process where alleles become more common through natural selection

• B) A process where alleles randomly change in frequency

• C) A mutation of genes in a population

• ) An evolutionary advantage due to better adaptation

What is the founder effect?

• • A) When a population evolves new traits

• • B) When a small population splits off and becomes isolated

• • C) When a population doubles in size

• • D) When a population experiences a sudden increase in diversity

Which scenario best describes the bottleneck effect?

• • A) A large population mixes with another population, increasing diversity

• • B) A small population becomes isolated and evolves new traits

• • C) A significant portion of a population is wiped out, reducing genetic diversity

• • D) New alleles are introduced into a population, causing rapid evolution

What caused the bottleneck effect in northern elephant seals?

• • A) A mutation in their genes

• • B) Hunting to near-extinction

• • C) A sudden change in climate

• • D) A new disease spreading through the population

What is gene flow?

• • A) The process of genes mutating within a population

• • B) When individuals move and breed between different populations

• • C) The loss of alleles in a population due to natural disasters

• • D) The introduction of new species into an ecosystem