Biology · Variation and Genetics
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A man with type AB blood marries a woman with type A blood. Which of the following blood types might their sons inherit?
- A
Type A or type O
- B
Type B or type O
- C
Type AB only
- D
Type A, type B, or type AB
d) Type A, type B, or type AB: Option (d) "Type A, type B, or type AB" is the correct answer. The sons can inherit type A blood from their mother (IAi) and type B blood from their father (IAIB). Additionally, they can inherit AB blood type if they inherit both A and B alleles from their father.
"Type A or type O" is not the correct answer. The father (AB blood type) does not carry any O allele. Therefore, their sons cannot inherit type O blood from the combination of their parents' genotypes.
"Type B or type O" is not the correct answer either. The mother (A blood type) does not carry any B allele. Therefore, their sons cannot inherit type B blood from the combination of their parents' genotypes.
"Type AB only" is not the correct answer. While the father has an AB blood type, the mother has an A blood type. Their sons cannot inherit AB blood type because the mother does not carry any B allele.
"Type A, type B, or type AB" is the correct answer. The sons can inherit type A blood from their mother (IAi) and type B blood from their father (IAIB). Additionally, they can inherit AB blood type if they inherit both A and B alleles from their father.
Tagged under Biology · Variation and Genetics · 2021