Question

If one parent has AB blood group and the other parent has A blood group (homozygous), these blood groups are not expected in their children:

• A. B and O
• B. A and AB
• C. A and B
• D. B and AB

Hint:

When analyzing inheritance patterns, consider the alleles each parent can contribute based on their genotype. This understanding is crucial in determining the possible blood groups of their offspring.

Answer 1

The Correct Option is A

Step 1: Understanding Blood Group Inheritance.
The AB parent can contribute either an A or a B allele, while the AA parent can only contribute an A allele. Therefore, the possible blood groups for the children are either A (from AA or AB parent contributing an A allele) or AB (from AB parent contributing a B allele while the other parent contributes an A allele). 
Step 2: Analyzing the Incorrect Options.
Given the parents' genotypes, the children cannot have blood group B or O. Blood group B would require a B allele from the AB parent and a B or O allele from the other parent, which is not possible as the other parent is homozygous A (AA). Similarly, blood group O is impossible as it would require both parents to contribute an O allele, which neither has.