PATHOLOGY

PATHOLOGY MCQ

GENETICS AND DISEASE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Angora rabbits have long fur. Rex rabbits have short fur. When an Angora rabbit is bred with a Rex rabbit, the offspring have fur length a little bit longer than that of a Rex rabbit. Which of the following types of inheritance patterns best describes the offsprings’ fur length? (3B3)
A
Codominance
B
Incomplete dominance
C
complete dominance
D
Multiple alleles
Explanation: 

Detailed explanation-1: -Angora rabbits have long fur. Rex rabbits have short fur. When an Angora rabbit is bred with a Rex rabbit, the offspring have fur length a little longer than that of a Rex rabbit.

Detailed explanation-2: -Coat color in rabbits is inherited as a series of multiple alleles. This means that there can be more than just 2 alleles for a single gene. In the case of coat color in rabbits, there are four alleles, and each one is expressed with a different phenotype.

Detailed explanation-3: -Codominance. Two alleles may be simultaneously expressed when both are present, rather than one fully determining the phenotype.

Detailed explanation-4: -In codominance, neither allele is dominant over the other, so both will be expressed equally in the heterozygote. In incomplete dominance, there is an intermediate heterozygote (such as a pink flower when the parents’ phenotypes are red and white).

There is 1 question to complete.