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Biology · 2025 · 2 marks
CBSE 2025 · Region 1 · Set 1 · Q20
Study the pedigree chart given below, showing the inheritance pattern of blood group in a family: Answer the following questions: (a) Give the…
Study the pedigree chart given below, showing the inheritance pattern of blood group in a family :
Answer the following questions :
(a)
Give the possible genotypes of individual $\displaystyle 1$ and 2.
(b)
Which antigen or antigens will be present on the plasma membranes of the R.B.Cs of individuals ' $\displaystyle 5$ ' and ' $\displaystyle 8$ ' ?
Marking-scheme solution
(a)
Individual $\displaystyle 1$ = $\displaystyle \mathrm{I}^{\mathrm{B}} \mathrm{i}$
Individual $\displaystyle 2$ = $\displaystyle \mathrm{I}^{\mathrm{A}} \mathrm{i}$
(b)
Individual $\displaystyle 5$ - Antigens A and B both are present on RBCs
Individual $\displaystyle 8$ - Neither antigen A nor Antigen B is present on the RBCs
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