If two corresponding genes at a given location on a pair of chromosomes are the same, they are referred to as
A) genotyped.
B) homozygous.
C) phenotyped.
D) heterozygous.
Answer: B
Rationale: Genes come in pairs, one inherited from each parent, aligned along the chromosomes. If the two copies of the gene are the same, then they are called homozygous. In contrast, if the genes differ they are heterozygous.
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