Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question
Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYPrinciples of Inheritance and Variation2 Marks
Question
How does the gene $‘I’$ control ABO blood groups in humans? Write the effect the gene has on the structure of red blood cells.
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Answer
Gene ' $l$ ' has three different alleles $l^A, l^B, i$.
$A^A$ produces $A$ type of sugar which results in $A$ group.
$I^B$ produces $B$ type of sugar which results in $B$ group.
Produces no sugar which result in O group.
The sugar polymers protrude from the surface of plasma membrane of RBCs which are characteristics of each blood group.
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