Dominance, Recessiveness, and Trait Expression

Question 1

How can you determine if a trait is dominant or recessive?

Answer 1

A dominant trait is expressed with at least one dominant allele; a recessive trait requires two recessive alleles.

Question 2

If an individual has the genotype Aa, will the dominant or recessive trait be expressed?

Answer 2

The dominant trait will be expressed.

Question 3

What genotype is required for a recessive trait to appear?

Answer 3

Homozygous recessive (aa).

Question 4

Why are carriers important in recessive trait inheritance?

Answer 4

They can pass on the recessive allele without showing the trait themselves.