PATHOLOGY MCQ
GENETICS AND DISEASE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Type A
|
|
|
Type B
|
|
|
Type AB
|
|
|
Type O
|
Detailed explanation-1: -If a man is homozygous for the blood group O i.e., genotype will be OO and he marries a female with blood group AB. Then the offspring will have blood group A, B according to the punnet square.
Detailed explanation-2: -An AB parent can indeed sometimes have an O child. But it is by no means common. In fact it would be fair to say that it is exceedingly rare.
Detailed explanation-3: -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-4: -Two parents with A blood type can produce a child with either A or O blood types. Two parents with B blood type can produce a child with either B or O blood type. One parent with A and another with B can produce a child with A, B, AB or O blood types.