NEET BIOLOGY

GENETICS AND EVOLUTION

GENETIC BASIS OF INHERITANCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If a man has blood group O and a woman has blood group AB, what is the probability that their child will be blood group O?
A
0%
B
25%
C
50%
D
100%
Explanation: 

Detailed explanation-1: -If two parents both have type O blood, all their children will have type O blood. If the husband has blood group O and wife blood group AB, the blood group of the child will be A or B but cannot be O or AB. Was this answer helpful?

Detailed explanation-2: -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’.

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: -Thus there is a chance of one child with O blood group out of 4.

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