Genetics Vocabulary Quiz

What is the term for an individual with two identical alleles for a particular trait?

• polygenic

• heterozygous

• monogamous

• homozygous

In a Punnett Square, what do the letters inside the boxes represent?

• Random letters with no significance

• Alleles for a specific trait

• Different species of organisms

• Genes for unrelated traits

If a genotype is represented as TT, what does this indicate about the alleles for the specific trait?

• One allele is dominant and the other is recessive

• Both alleles are dominant

• The genotype is heterozygous

• Both alleles are recessive

What is the term for an individual with two different alleles for a particular trait?

• monohybrid

• homozygote

• heterozygote

• dihybrid

In a Punnett Square, what is the probability of producing an offspring with a homozygous recessive genotype from two heterozygous parents?

• 50%

• 75%

• 10%

• 25%

What is the term for the physical expression of a genotype?

• chromosome

• genotype

• allele

• phenotype

If an organism has the genotype Aa, what is the corresponding phenotype for the specific trait?

• The corresponding phenotype for the specific trait would be the dominant trait, as the dominant allele A will be expressed.

• The corresponding phenotype would be the absence of the specific trait, as the genotype is heterozygous.

• The corresponding phenotype would be a combination of both dominant and recessive traits.

• The corresponding phenotype would be the recessive trait, as the recessive allele a will be expressed.

What is the term for an individual with a dominant allele for a particular trait?

• Recessive

• Homozygous recessive

• Homozygous dominant

• Heterozygous dominant

In a Punnett Square, what is the probability of producing an offspring with a heterozygous genotype from two heterozygous parents?

• 100%

• 25%

• 75%

• 50% or 1/2

If a genotype is represented as rr, what does this indicate about the alleles for the specific trait?

• Both alleles are dominant

• One allele is dominant and one is recessive

• Both alleles are recessive

• One allele is recessive and one is incomplete dominant