Evolution

Which Hardy-Weinberg factor represents the frequency of heterozygous individuals in a population?

• p²

• 2pq

• q²

• p² + 2pq

A few deer wander out of their native woods into a completely new park where no deer had ever been before. They go on to create an entirely new population.

• Genetic Drift
• Natural Selection
• Non-random mating
• Mutation

In the Hardy-Weinberg Equation, q² is the frequency of what?

• The recessive allele 
• the dominant allele
• the recessive genotype
• the dominant genotype

A population of 150 individuals has an allele frequency of 0.3 for the dominant allele (B) and a frequency of 0.7 for the recessive allele (b). Use the Hardy-Weinberg equation to determine the frequency of the genotype (bb).

• 0.09
• 0.42
• 0.49
• 0.21

The allele frequency of p=.20 What is the percentage of recessive genotype?

• .80

• .04

• .32

• .64

Gene flow involves

• Natural disasters killing most of the members of a population
• Individuals moving into and out of the population
• Selective mating
• Small changes because of the environment

Which of the following statements is supported by the graph below?

• The population is in Hardy-Weinberg equilibrium, as the sum of the frequency of the dominant allele and the recessive allele is always equal to 1
• The percentage of individuals homozygous recessive for this particular trait is increasing over time
• Selection has caused frequencies to change over time because individuals with a dominant allele survive at higher rates than individuals with recessive alleles
• Individuals who are homozygous recessive for this particular trait have migrated into the population, causing the frequency to approach 1

Which of these is a condition that must be met for Hardy-Weinberg equilibrium?

• extremely small population size

• no natural selection

• gene flow

• nonrandom mating

What does p stand for?

• dominant allele

• recessive allele

• homozygous dominant

• homozygous recessive

• heterozygous

Which of the following is an example of the bottle neck effect?

• Bald Eagles are hunted until near extinction, population recovers.
• Small group of iguanas floats to an island, starts a new population.
• Red fox pups are more likely to survive in a snowy environment if they are born white.
• Farmer chooses seeds from largest apples to plant next year.  This results in larger apples from year to year.