Genetics Quiz

What term describes an individual with two of the same alleles for a particular gene?

• a. Heterozygous

• b. Dominant allele

• c. Homozygous

• d. Recessive allele

What type of inheritance results when two different alleles are equally expressed in the phenotype of an individual?

• a. Heterozygous

• b. Complete dominance

• c. Codominance

• d. Recessive allele

What do we call a person who has a recessive allele for a genetic trait but does not display the trait?

• a. Affected

• b. Homozygous

• c. Carrier

• d. infected

In genetics, what is the name for an allele that is only expressed when two copies are present?

• a. Incomplete dominance

• b. Codominance

• c. Homozygous

• d. Recessive allele

An individual with one dominant and one recessive allele for a particular gene is called:

• a. Heterozygous

• b. Incomplete dominance

• c. Codominance

• d. Homozygous

In sex-linked inheritance, genes are located on which chromosomes?

• a. X chromosome

• b. Y chromosome only

• d. Autosomal chromosomes

Which is the correct genotype for an individual that expresses a recessive trait?

• a. AA

• b. Aa

• c. aa

An individual who displays the trait determined by a particular gene is described as:

• a. Affected

• b. Heterozygous

• c. Carrier

• d. infected

If a son inherits an X-linked recessive disorder, from whom did they likely inherit it?

• a. Father

• b. Mother

• c. Both parents equally

• d. Cannot be determined

Which term refers to a genetic scenario where one allele is not completely dominant over another, but instead blending occurs?

• a. Complete dominance

• b. Recessive allele

• c. Incomplete dominance

• d. Codominance