HEREDITY
INCOMPLETE DOMINANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In a certain species of animal, black fur (B) is dominant over tan fur (b). If two heterozygous parents were crossed what would the parent genotypes be?
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BBxbb
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BBxBb
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BbxBb
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bbxBb
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Explanation:
Detailed explanation-1: -Since black fur B is dominant, so both parents with genotype Bb will be having black furs.
Detailed explanation-2: -At the end of the process the genotypic ratio is 1 (BB) : 2(Bb) : 1(bb). The phenotypic ratio will be 3 (Black fur) : 1 (brown fur).
Detailed explanation-3: -While the genotype tells us what alleles an organism has, the phenotype describes which trait is expressed. So, the phenotype of the dog on the top is black fur, and the phenotype of the dog on the bottom is yellow fur.
Detailed explanation-4: -We the black furred dog has to be genotype aa because he displays the recessive phenotype. The offspring produced from this cross would be 2 Aa and 2 aa genotypes, based on a punnet square.
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