PATHOLOGY MCQ
GENETICS AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In a certain species of rabbits, black coat color is dominant over brown coat color. What is the probability of producing a rabbit with brown coat color from two rabbits that are both heterozygous for black coat color?
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100%
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50%
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25%
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10%
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Explanation:
Detailed explanation-1: -A rabbit that is heterozygous Bb will be black. Why? Because the B allele is dominant over the recessive b allele, so a rabbit with genotype Bb will have the same coat color phenotype as a rabbit with the dominant homozygous genotype BB. View this relationship in a Punnett square.
Detailed explanation-2: -A rabbit with the genotype of “BB” would have a phenotype of black fur, a genotype of “Bb” would have gray fur (a display of both black and white) and a genotype of “bb” would have a phenotype of white fur.
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