Identify the wrong statement with reference to the gene $I$ that controls $ABO$ blood groups.

  • A
    Allele $i$ does not produce any sugar.
  • B
    The gene $I$ has three alleles.
  • C
    $A$ person will have only two of the three alleles.
  • D
    When $I^{A}$ and $I^{B}$ are present together,they express same type of sugar.

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The genotypes of a husband and wife are $I^A I^B$ and $I^A I^O$. Among the blood groups of their children, how many different genotypes and phenotypes are possible?

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Identify the incorrect statement regarding the gene '$I$' that controls the $ABO$ blood grouping.

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