GENETICS AND EVOLUTION
GENETIC BASIS OF INHERITANCE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
A person with type O blood marries a person with type AB blood. Possible blood genotypes of their children are
|
|
I(A)i and I(B)I(B)
|
|
|
I(B)I(B) and I(A)I(A)
|
|
|
I(A)i and I(B)i
|
|
|
I(A)I(B) and ii
|
Explanation:
Detailed explanation-1: -In most cases, an O parent and an AB parent will have only A or B kids. I added a table at the end of this answer that has all blood type combinations for two parents plus the possible blood types for their children. Exceptions to these rules are extremely rare.
Detailed explanation-2: -Someone with blood type AB must have both the A and B alleles. The genotype must be AB. Someone with blood type O has neither the A nor the B allele. The genotype must be OO.
Detailed explanation-3: -If a man with type AB blood marries a woman with type O, the children will have blood types A and B. Each blood type will be a fraction of ½. This is because ‘A’ and ‘B’ alleles are dominant alleles on ‘O’.
There is 1 question to complete.