PATHOLOGY

PATHOLOGY MCQ

GENETICS AND DISEASE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A scientist crosses a rabbit with short fur and a rabbit with long fur. Which of these outcomes would show that the trait for fur length is an example of incomplete dominance?
A
All the offspring have no fur
B
All the offspring have long fur
C
All the offspring have short fur
D
All the offspring have medium-length fur
Explanation: 

Detailed explanation-1: -A scientist crosses a rabbit with short fur and a rabbit with long fur. Which of these outcomes would show that the trait for fur length is an example of incomplete dominance? All the offspring have no fur.

Detailed explanation-2: -Examples of codominance in animals include speckled chickens, which have alleles for both black and white feathers, and roan cattle, which express alleles for both red hair and white hair. Codominance is also seen in plants.

Detailed explanation-3: -Answer and Explanation: The correct answer is (B) Wavy hair. Incomplete dominance occurs when an organism with two different alleles for a gene expresses a phenotype that is an intermediate between the two different alleles.

Detailed explanation-4: -The color of a mouse’s fur is affected by the alleles they inherit for the MC1R gene. Mice that have two copies of allele 1 have the lightest fur, those with two copies of allele 2 have the darkest fur, and heterozygotes have intermediate fur color (though it is closer to the dark fur color).

There is 1 question to complete.