Evolution of Populations & Speciation

What do you call the collection of all the genes and the alleles of all individuals within a population?

• Gene pool

• Relative Frequency

• Genetic Drift

• Allele pool

The measure of how common an allele is in a population is known as ___________.

• Allele Combination

• Allele Frequency

• Gene Pool

• Genotypic Frequency

Many members of one species in an area

• ecosystem

• community

• biodiversity

• population

A population of pigs with small, medium, and long snouts lives on an island together with burrowing termites. Pigs that have the longest snouts tend to survive better. Over time, most of the pig population is made up of individuals that have very long snouts. This is an example of which type of selection?

• directional selection

• disruptive selection

• stabilizing selection

• sexual selection

If finches with large beaks and finches with small beaks increase in a population while finches with average sized beaks decreases, which pattern of natural selection has occurred?

• Directional selection
• Disruptive selection 
• Stabilizing selection
• Sexual Selection

What are sources of genetic variation?

• mutations

• genetic recombination

• mutations and genetic recombination

• mutations and migrations

What does the image represent?

• Founder effect

• Bottleneck effect

• Natural Selection

• Mutations

What is speciation?

• The process by which populations become geographically isolated

• The process in which reproductively isolated populations evolve to become distinct species

• The process in which reproductively isolated populations do not evole

• None of these

Temporal isolation occurs when two different populations

• develop different mating behaviors
• become geographically separated
• reproduce at different times
• interbreed

Two groups of chipmunks cannot mate anymore because the grand canyon separates them; this is

• Behavioral isolation

• Geographic isolation

• Temporal isolation

• Mechanical isolation