Heredity Quiz

Which one is an example of homozygous dominant genotype?

• AA

• Aa

• aa

Which one is an example of homozygous recessive genotypes?

• AA

• aa

• Aa

Which one is an example of heterozygous genotype?

• Aa

• aa

• AA

What type of dominance occurs when one allele completely dominates over another allele? (For example, if an organism has a freckles allele and a no freckles allele, then it will have freckles.)

• Codominance

• Complete Dominance

• Incomplete Dominance

Which type of dominance occurs when neither allele dominates over the other, but the phenotype is an intermediate of both alleles? (For example, if a red flower is mated with a white flower, their offspring would be pink)

• Codominance

• Incomplete dominance

• Complete dominance

What type of dominance occurs when neither allele dominates over the other, but the phenotype is an expression of both alleles? (For example, If a brown cow is mated with a white cow, the offspring has both white & brown spots)

• Incomplete dominance

• Complete dominance

• Codominance

Which Punnett Square is correct for a heterozygous mother AND a heterozygous father?

• A

• B

• C

• D

Calculate the genotype ratio for this Punnett Square

• 1 FF: 1 Ff: 2 ff

• 3 FF: 1 ff

• 2 FF: 1 Ff: 2 ff

• 1 FF: 2 Ff: 1 ff

Calculate the phenotype ratio for this Punnett square (remember Freckles are dominant)

• 2 Freckles: 2 no freckles

• 3 Freckles: 1 no freckles

• 1 Freckles: 2 both: 1 no freckles

Explain how it is possible for this couple to have a child without freckles.