PATHOLOGY MCQ
GENETICS AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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heterozygous
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hybrid
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carrier
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homozygous
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Detailed explanation-1: -What term doesn’t belong? Homozygous does not belong because homozygous would be RR and heterozygous and hybrid are both Rr and a carrier could be a hybrid because it could not have the trait, yet still have it in the genes and carry it.
Detailed explanation-2: -Homozygous, as related to genetics, refers to having inherited the same versions (alleles) of a genomic marker from each biological parent. Thus, an individual who is homozygous for a genomic marker has two identical versions of that marker.
Detailed explanation-3: -Homozygous Recessive Examples If both parents have brown eyes but have a child with blue eyes, we have an example of a homozygous recessive phenotype. In this case, brown eyes are dominant. If brown eyes were recessive, all offspring would have brown eyes.