Genetics Quiz

Which of the following would be a phenotype?

• DNA

• Homozygous

• Heterozygous

• Brown Eyes

Which of the following genotypes is heterozygous?

• AA

• A

• aa

• Aa

In a heterozygous genotype, the ________ allele takes over in the phenotype?

• Recessive

• Dominant

• Lower Case Letter

• Both

Recessive alleles. are represented by a____

• Lowercase letter

• Capital letter

• Both

Which of these characteristics would NOT be passed on to its offspring?

• Hair Color

• Eye Color

• Cut on the Skin

• Blood Type

What is the genotypic ration of the offspring?

• 1:4

• 3:1

• 1:2:1

• 1:2

What is the phenotypic ratio of the offspring? (A-Brown hair, a-blond hair)

• 50% Brown Hair and 50% Blond Hair

• 25% Brown Hair and 75% Blond Hair

• 75% Brown Hair and 25% Blond Hair

• 0% Brown Hair and 100 % Blond Hair

In a certain breed of chicken, feather color follows an incomplete dominance pattern. A heterozygous chicken is known as an Andalusian blue. When a blue rooster mates with a black hen, what is the predicated probability for their offspring?

• 100% Blue

• 50% Blue, 25% White, 25% Black

• 50% Black, 50% Blue

• 50% White, 50% Black

Which statement is true about X-linked genes?

• The male needs two copies of the gene but will express the trait regardless of whether the alleles are dominant or recessive

• The male needs two copies of the gene but will express the trait only if both alleles are dominant.

• The male needs only one copy of the gene and will express the trait regardless of whether the allele is dominant or recessive.

• The male needs only one copy of the gene but will express the trait only if the allele is dominant.

The genotype Aa is called

• Homozygous recessive

• capital letter

• both

• Heterozygous