How are the terms homozygous and heterozygous different?

Question

Responses

Homozygous describes having two of the same allele for a trait, and heterozygous describes having two different alleles for a trait.
Homozygous describes having two of the same allele for a trait, and heterozygous describes having two different alleles for a trait.

Homozygous describes having recessive alleles for a trait, and heterozygous describes having dominant alleles for a trait.
Homozygous describes having recessive alleles for a trait, and heterozygous describes having dominant alleles for a trait.

Homozygous describes having dominant alleles for a trait, and heterozygous describes having recessive alleles for a trait.
Homozygous describes having dominant alleles for a trait, and heterozygous describes having recessive alleles for a trait.

Heterozygous describes having two of the same allele for a trait, and homozygous describes having two different alleles for a trait.

Answer 1

The correct response is:

Homozygous describes having two of the same allele for a trait, and heterozygous describes having two different alleles for a trait.

This means that an individual who is homozygous for a specific trait has inherited the same version of a gene (allele) from both parents, whereas an individual who is heterozygous has inherited different versions of that gene.