HEREDITY
INCOMPLETE DOMINANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A breed of chicken shows incomplete dominance for feather color. One dominant allele codes for black feathers, another dominant allele codes for white feathers. The feathers of heterozygous chickens of this breed will be ____
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all black
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all white
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all gray
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speckled black and white
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Explanation:
Detailed explanation-1: -Codominance: In some breeds of chickens, black feathers and white feathers are both dominant genes and heterozygous individuals appear checkered with black and white feathers.
Detailed explanation-2: -Feather color in chickens is a trait that shows incomplete dominance with an allele for black feathers and an allele for white feathers.
Detailed explanation-3: -Gray: 100% Cross a BLACK chicken (BB) with a WHITE chicken (WW). These alleles show INCOMPLETE DOMINANCE.
Detailed explanation-4: -In the given case, alleles for black color and white color are expressed independently in the offspring, generating a black and white speckled offspring. So, this serves as an example of codominance.
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