Question

The blood group of the mother is A\(^+\) and that of the father is AB\(^+\). Which of the following statements is/are correct?

• A. Probability of the offspring with A\(^+\) blood group is 0.5
• B. Probability of the offspring with AB\(^+\) blood group is 0.125
• C. Probability of the offspring with B\(^+\) blood group is 0.125
• D. Probability of the offspring with O\(^+\) blood group is 0.375

Hint:

Blood group inheritance follows Mendelian genetics. The ABO and Rh factors are inherited independently, and the probability of offspring blood type is calculated based on parental genotypes.

Answer 1

The Correct Option is A, C

To determine the probabilities of different blood groups, we consider the ABO blood group inheritance and Rh factor.

Step 1: Blood group inheritance
The mother is A⁺, meaning her genotype could be either AA or AO, and the father is AB⁺, meaning his genotype is AB. The children can inherit the following ABO combinations:

• A from the mother and A from the father: A⁺ blood group.
• A from the mother and B from the father: AB⁺ blood group.
• O from the mother and B from the father: B⁺ blood group.
• O from the mother and A from the father: A⁺ blood group.

Step 2: Rh factor inheritance
For the Rh factor, both the mother and father are Rh⁺, so the children have a 75% chance of being Rh⁺.

Step 3: Calculate the probabilities

• The probability of A⁺ blood group is 0.5.
• The probability of AB⁺ blood group is 0.125.
• The probability of B⁺ blood group is 0.125.
• The probability of O⁺ blood group is 0.375.

Thus, the correct answers are  A  and  C.

Final Answer:
The correct answers are  A,  C.