Question

question 42 (1 point)
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for a simple trait with one dominant and one recessive gene, a person will display the recessive trait
only if they are homozygous for the recessive trait.
if they are heterozygous or homozygous for the recessive trait.
only if they are heterozygous.
as long as they inherit one copy of the recessive trait.

Explanation:

According to Mendelian genetics, for a simple trait with one dominant and one recessive gene, the dominant allele masks the recessive allele. A person will display the recessive trait only when they have two copies of the recessive allele (homozygous recessive). In a heterozygous state (one dominant and one recessive allele), the dominant trait is expressed.

Answer:

only if they are homozygous for the recessive trait.