Question

Which describes a trait from a recessive gene?

A
it causes a mutation.
B
It can appear if it is heterozygous.
C
It masks a dominant gene trait.
D
It usually appears only if it is homozygous.

Answer 1

D- It usually appears only if it is homozygous.

Step-by-step explanation:

If it is a recessive trait, it must have two of the same allele in order to be present.

Ex-

A= dominant

a=recessive

The phenotype must be aa, which is homozygous.