An individual is homozygous for a gene if:
A)the mother is homozygous for the gene.
B)the father is homozygous for the gene.
C)they developed from a sperm and an egg that carried the same allele.
D)they developed from a sperm and an egg that carried different alleles.
E)None of the other answer options is correct.

Question

Quizplus · Accepted Answer

An individual is homozygous for a gene if they developed from a sperm and an egg that carried the same allele. This means that both copies of the gene are the same, either both dominant or both recessive. The genotype can be written as either homozygous dominant (AA) or homozygous recessive (aa). The mother and father's genotype may or may not be homozygous for the gene, but it is only relevant if they passed on the same allele to their offspring.

An Individual Is Homozygous for a Gene If