What does heterozygous mean?

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Prepare for the Anatomy and Physiology Test. Use flashcards and multiple choice questions, each with hints. Enhance your knowledge for the exam of the multiple organ systems!

Multiple Choice

What does heterozygous mean?

Explanation:
Heterozygous means you have two different alleles at the same gene locus in a diploid organism. You inherit one allele from each parent, and if those alleles differ (for example, A and a or B and b), the genotype is heterozygous. This is distinct from being homozygous, where both alleles at that locus are identical (like AA or aa). Remember, heterozygosity concerns variation at a single gene locus, not two different genes or having only one chromosome.

Heterozygous means you have two different alleles at the same gene locus in a diploid organism. You inherit one allele from each parent, and if those alleles differ (for example, A and a or B and b), the genotype is heterozygous. This is distinct from being homozygous, where both alleles at that locus are identical (like AA or aa). Remember, heterozygosity concerns variation at a single gene locus, not two different genes or having only one chromosome.

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