The first 22 chromosomes contain hundreds of genes in the same positions and sequence. If the code of the gene from one parent differs from the code on the same gene from the other parent, the gene pair is _____.
A) homozygous
B) heterozygous
C) monozygotic
D) dizygotic

Question

Quizplus · Accepted Answer

If the code of the gene from one parent differs from the code on the same gene from the other parent, the gene pair is heterozygous. Homozygous means both alleles (copies of the gene) are the same, while heterozygous means the alleles are different. Monozygotic and dizygotic refer to twins, and are not relevant to this question.

The First 22 Chromosomes Contain Hundreds of Genes in the Same