Population Genetics | Chemistry | Quiz

1. Variations in genes are called _____.

alleles

genotypes

phenotypes

recessive traits

2. The rediscovery of the research by ______ led to understanding that genes are the carriers of inherited traits.

Charles Darwin

Gregor Mendel

Reginald Punnett

Wilhelm Weinberg

3. For a recessive trait to appear, the individual must receive the variant genes from both parents.

true

false

4. Assume B is a dominant allele for black hair and r is a recessive allele for red hair. If one parent has black hair, with the genotype Br, with and the other parent has red hair, with the genotype rr, what are the potential genotypes for their children?

BB, rr, rr

Br, rB, rr, BB

Br, Br, rr, rr

Br, Br, rB, rB

5. The characteristics an individual expresses due to their genetic makeup are called:

alleles

genotypes

phenotypes

recessive traits

6. Individuals who possess a copy of both a dominant and recessive allele are called:

an anomaly

a Founder

homozygous

heterozygous

7. All disease-causing genes are detrimental to the human population.

false

true

8. Genetic drift can be defined as:

Gene frequencies change over time because of random effects due to a large population size.

Gene frequencies change over time because of random effects due to a small population size.

Gene frequencies stay the same over time because of random effects due to a small population size.

Gene frequencies change over time because of predicted effects due to a small population size.

9. Imagine you raise goldfish as a pet dealer. You have over 10,000 fish in one large tank but, due to an electrical problem, 95% of the fish perish one night. The remaining 5% are left to breed and repopulate, passing their genes and traits on to future generations. What type of genetic drift would this be considered?

Bottleneck event

Founder effect

Extinction

Natural selection

10. You are researching a population of 100 squirrels, where 80 of them are gray and 20 are black. You know that the black color is a recessive trait for this type of squirrel. Using the Hardy-Weinberg Equilibrium equation, (p² + 2pq + q² = 1), what number would be heterozygous (having gray fur, but with only one gray fur allele)?