Epistasis

Which statement accurately defines epistasis?

• When two genes independently determine a single trait.

• When one gene influences the expression of another gene.

• When multiple genes contribute to a continuous trait.

• When alleles of a single gene interact to produce a phenotype.

In Labrador coat color inheritance, what does the dominant allele 'E' of Gene 1 control?

• The specific color of the fur (e.g., black or brown).

• The production of pigment.

• The texture of the fur.

• The length of the fur.

A Labrador with the genotype 'ee' for Gene 1 will always have which coat color, regardless of the alleles for Gene 2?

• Black

• Brown

• Yellow

• White

What is the phenotypic ratio of Black:Yellow:Brown offspring resulting from a genetic cross between two EeBb Labradors?

• 9:3:4

• 9:4:3

• 1:2:1

• 3:1:0

What is the complete genotype of the brown offspring in the pedigree diagram?

• EeBb

• EEbb

• Eebb

• eeBb

What is the complete genotype of the black offspring shown in the pedigree diagram?

• EeBb

• EEBb

• eeBb

• Eebb

What is the fruit color of a squash with the genotype Aabb?

• Green

• Yellow

• White

• Black

What is the fruit color of a squash with the genotype aaBB?

• Green

• Yellow

• White

• Brown