PATHOLOGY MCQ
GENETICS AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Having two different alleles is called
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dominant
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recessive
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heterozygous
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homozygous
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Explanation:
Detailed explanation-1: -Listen to pronunciation. (HEH-teh-roh-ZY-gus JEE-noh-tipe) The presence of two different alleles at a particular gene locus. A heterozygous genotype may include one normal allele and one mutated allele or two different mutated alleles (compound heterozygote).
Detailed explanation-2: -The presence of two different mutated alleles at two separate genetic loci.
Detailed explanation-3: -When the loci in the matching chromosomes bear the same alleles, it is described as heterozygous. For example, a ‘heterozygous’ organism for a particular trait means that it possesses dissimilar alleles (e.g. Aa); one of the alleles is dominant and the other is recessive.
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