Please choose the best answer to the following questions.

1.			A niche is
			A)	all the alleles in a population.
			B)	a trait coded by a single gene.
			C)	the environment of an organism.
			D)	a trait coded by more than one gene.
2.			The percentage of times a particular allele appears in a population is referred to as the
			A)	allele frequency.
			B)	phenotype.
			C)	genotype.
			D)	None of the above.
3.			Sickle cell anemia is an example of
			A)	a chromosomal mutation.
			B)	a point mutation.
			C)	gene flow.
			D)	fission.
4.			Down syndrome is an example of
			A)	a chromosomal mutation.
			B)	a point mutation.
			C)	gene flow.
			D)	fission.
5.			Mutations are the result of
			A)	environmental influences.
			B)	chemical pollutants.
			C)	cosmic radiation.
			D)	All the above.
6.			Which mutations can effect evolutionary change?
			A)	Mutations in skin cells.
			B)	Mutations in gametes.
			C)	Mutations in brain cells.
			D)	All the above.
7.			Why did Charles Darwin delay in making his idea of natural selection known to the public?
			A)	He felt the public was not ready.
			B)	Extinction as natural and commonplace was an uncomfortable idea.
			C)	Natural selection does not produce change in a particular direction.
			D)	All the above.
8.			Individuals tend to find mates within their own
			A)	gene pool.
			B)	breeding population.
			C)	genotypes.
			D)	All the above.
9.			Altering allele frequency and adding genetic variation to a species is referred to as
			A)	gene frequency.
			B)	Mendelian genetics.
			C)	gene flow.
			D)	fission.
10.			________ is the opposite of gene flow.
			A)	Fission
			B)	Gene frequency
			C)	Sampling error
			D)	Gene pool
11.			Genetic differences between populations, produced because genetically different individuals established the populations, is known as
			A)	a bottleneck.
			B)	a gene pool.
			C)	the founder effect.
			D)	a breeding population.
12.			Which of the following is a reason why a bottleneck in a population could occur?
			A)	epidemic disease.
			B)	natural disaster.
			C)	overexploitation by humans.
			D)	All the above.
13.			The connection between sickle cell and African Americans is an example of
			A)	fission.
			B)	gene frequency.
			C)	the founder effect.
			D)	a gene pool.
14.			Gamete sampling is defined as
			A)	the genetic change caused when genes are passed to new generations in frequencies unlike those of the parental generations.
			B)	when a sample chosen for study does not accurately represent the population from which the sample was taken.
			C)	a severe reduction in the size of a population, such that only certain genes survive and come to characterize the descendent population.
			D)	those who classify and name living organisms.
15.			Which of the following is an example of genetic drift?
			A)	fission
			B)	founder effect
			C)	gamete sampling
			D)	All the above.