PATHOLOGY MCQ
GENETICS AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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has the same allele on both chromosomes in a chromosome pair.
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has extra alleles on both chromosomes in a chromosome pair.
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is missing alleles on the chromosomes in a chromosome pair.
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has different alleles on the chromosomes in a chromosome pair.
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Detailed explanation-1: -To be homozygous for a trait is to have identical pairs of the genes (called alleles) that determine how it develops. To be heterozygous for a trait is to have different alleles for it. Being homozygous for a trait means that it will always turn out the same.
Detailed explanation-2: -Answer and Explanation: The statement that if both copies of a given gene in an organism are identical, the organism is homozygous for the trait is True. If the two copies of a given gene are identical in an organism, that means the allele pairs are identical.
Detailed explanation-3: -An organism with two dominant alleles for a trait is said to have a homozygous dominant genotype. Using the eye color example, this genotype is written BB.