Unit 1 Review - Natural Selection

The video tutorial covers the basics of evolution, defining it as changes in allele frequency within a population. It explains natural selection as differential reproductive success and introduces the concept of fitness. The tutorial discusses the Hardy-Weinberg equilibrium through a population genetics lab, providing examples of natural selection like flowering time changes and sickle cell anemia. It also covers genetic drift, the bottleneck effect, and evidence for evolution, such as antibiotic resistance and homologous structures. The video concludes with a discussion on common ancestry and a camouflage lab experiment.

What is the smallest unit in biology that can evolve?

• An individual organism

• A gene

• A population

• A species

What is the primary mechanism by which evolution occurs?

• Genetic drift

• Mutation

• Natural selection

• Gene flow

During the industrial revolution, what caused the shift in the peppered moth population?

• Climate change

• Introduction of new predators

• Change in tree bark color

• Migration of moths

In the population genetics lab, what condition must be met for allele frequencies to remain constant?

• Natural selection

• Non-random mating

• Small population size

• No mutations

What is an example of heterozygote advantage discussed in the transcript?

• Galapagos finches

• Antibiotic resistance

• Sickle cell anemia

• Peppered moth coloration

What is genetic drift primarily associated with?

• Large populations

• Gene flow

• Random chance

• Natural selection

Which effect describes a large population being reduced to a small size, losing genetic diversity?

• Bottleneck effect

• Founder effect

• Mutation

• Gene flow

What is a key piece of evidence for evolution mentioned in the transcript?

• Fossil records

• Antibiotic resistance

• Climate change

• Migration patterns

What does the presence of homologous structures in different species suggest?

• Convergent evolution

• Common ancestry

• Random mutation

• Independent evolution

What is the 'trump card' for evidence of evolution according to the transcript?

• DNA and RNA

• Fossil records

• Homologous structures

• Biogeography