LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

GENETICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
occurs when both alleles can be observed in theoffspring’s phenotype [example:a brown cow and a white bull produce a calf with both brown and white patches]
A
Dominant Trait
B
Incomplete Dominance
C
Codominance
D
Complete Dominance
Explanation: 

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.

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