How many copies of a recessive allele are needed for that trait to show up?

Question

one

zero

two

The recessive trait will never be observed regardless of the alleles present.

Answer 1

A recessive allele requires two copies for that trait to show up. Only when an individual has two recessive alleles (homozygous recessive) will the recessive trait be expressed. If they have one dominant allele (heterozygous), the dominant trait will be observed instead.