- Home
- Standard 12
- Biology
4.Principles of Inheritance and Variation
medium
Mother and father both have blood group $‘A’$. They have two children one with blood group $‘O’$ and second one with blood group $‘A’$. They have
A
mother has homozygotic gene father has heterozygote $I'^A \,I^A$.
B
both are homozygotic $(I^AI^A)$
C
mother is heterozygotic $(I^Ai)$ and father is homozygotic $(I^AI^A)$
D
both are heterozygotic $(I^Ai)$
(AIIMS-2009)
Solution
In the mentioned case, one child with blood group $‘O’$ and second with blood group $‘A’ $are born to parents with heterozyous condition of genes for blood group $A$ . i.e.,
$I^AI^0$. Both mother and father have blood group $A$ but their genotypes indicate heterozygotic condition.
Standard 12
Biology
