$ABO$ blood groups in humans are controlled by the gene $I$. It has three alleles ­$ I^A, I^B$ and $i$. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?

  • [AIPMT 2010]
  • A

    Three

  • B

    One

  • C

    Four

  • D

    Two

Similar Questions

Which of the following is genetically dominant in man

$A$ woman is married for the second time. Her first husband was $ABO$ blood type $A,$ and her child by that marriage was type $O.$ Her new husband is type $B$ and their child is type $A B$.

What is the women's $ABO$ genotype and blood type?

How many phenotype and genotypes are possible in ABO blood group systems?

The $ABO$ blood group are controlled by

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

  • [NEET 2017]