OBJECTIVE LIFE SCIENCE
GENETICS
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Dominant Trait
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Incomplete Dominance
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Codominance
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Complete Dominance
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Detailed explanation-1: -A “red” roan results from the mating of a chestnut parent and a white parent (Figure 2). We know this is codominance because individual hairs are either chestnut or they are white, leading to the red roan overall appearance.
Detailed explanation-2: -An example of codominance is the roan cow which has both red hairs and white hairs. In incomplete dominance a heterozygous individual blends the two traits. An example of incomplete dominance is the pink snapdragon, which receives a red allele and white allele.
Detailed explanation-3: -Spotted cows and flowers with petals of two different colors are examples of codominance, for example. Codominance also occurs in some less visible traits, such as blood type. The A and B alleles for blood type can both be expressed at the same time, resulting in type AB blood.