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How many phenotypes can occur in the human blood group ABO with alleles IA IB i?

  • a)
    2

  • b)
    4

  • c)
    3

  • d)
    1

Correct answer is option 'C'. Can you explain this answer?
Verified Answer
How many phenotypes can occur in the human blood group ABO with allele...
The correct answer is 3. In the ABO blood group system, there are three alleles: IA, IB, and i. The IA and IB alleles are co-dominant, while the i allele is recessive to both IA and IB.
The possible genotypes and corresponding phenotypes are as follows:
  • IAIA or IAi genotype results in blood type A phenotype.
  • IBIB or IBi genotype results in blood type B phenotype.
  • IAIB genotype results in blood type AB phenotype.
  • ii genotype results in blood type O phenotype.
Therefore, there are three possible phenotypes: A, B, and AB. The O blood type is not considered a distinct phenotype but rather a lack of the A or B antigen expression.
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How many phenotypes can occur in the human blood group ABO with alleles IA IB i?a)2b)4c)3d)1Correct answer is option 'C'. Can you explain this answer?
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