Question:

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

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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.
Updated On: Apr 11, 2025
  • Probability of the offspring with A\(^+\) blood group is 0.5
  • Probability of the offspring with AB\(^+\) blood group is 0.125
  • Probability of the offspring with B\(^+\) blood group is 0.125
  • Probability of the offspring with O\(^+\) blood group is 0.375
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The Correct Option is A, C

Solution and Explanation

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.
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