Read the given passage and answer the question.
ABO blood groups in human beings are controlled by the gene $I$. The plasma membrane of the red blood cells has sugar polymers that protrude from its surface and the kind of sugar is controlled by the gene. The gene ($I$) has three alleles $I^A, I^B$ and $i$. The alleles $I^A$ and $I^B$ produce a slightly different form of the sugar while allele $i$ does not produce any sugar. Because humans are diploid organisms, each person possesses any two of the three $I$ gene alleles. $I^A$ and $I^B$ are completely dominant over $i$.
Match List - I with List - II.
|
List – I (Phenotype) |
List – II (Genotype) |
|
(A) Blood group A |
(I) $I^BI^B, I^Bi$ |
|
(B) Blood group B |
(II) $I^Ai,I^AI^A$ |
|
(C) Blood group O |
(III) $I^A I^B$ |
|
(D) Blood group AB |
(IV) $ii$ |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A)-(II), (B)-(I), (C)-(IV), (D)-(III)
|
List – I (Phenotype) |
List – II (Genotype) |
|
(A) Blood group A |
(II) $I^Ai,I^AI^A$ |
|
(B) Blood group B |
(I) $I^BI^B, I^Bi$ |
|
(C) Blood group O |
(IV) $ii$ |
|
(D) Blood group AB |
(III) $I^A I^B$ |
Blood group A can have genotypes IAIA or IAi.
Blood group B can have genotypes IBIB or IBi.
Blood group O has the genotype ii.
Blood group AB has the genotype IAIB.