Question

(a) A man with blood group ‘A’ marries a woman with blood group ‘AB’. The first child born to them has blood group ‘B’. Work out a cross to find the genotype of the father. Give the possible blood groups and their genotypes of the children that could be born to this couple. (Use a Punnet square).

Hint:

The ABO blood grouping system is crucial for safe blood transfusions and organ transplants.

Answer 1

Father's Genotype: \( I^A i \)
Mother's Genotype: \( I^A I^B \)
Punnett Square:
\[\begin{array}{c|c|c} & I^A & I^B \\ I^A & I^A I^A & I^A I^B \\ i & I^A i & I^B i \\ \end{array}\]
Children’s Blood Groups:

• Blood Group A: \( I^A I^A \), \( I^A i \)
• Blood Group B: \( I^B i \)
• Blood Group AB: \( I^A I^B \)