Which one of the following blood groups is expressed in both homozygous and heterozygous conditions?

  • A
    Only $A$
  • B
    Only $B$
  • C
    $A$ and $B$
  • D
    $O$

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Genes located on homologous chromosomes for the same trait are called.....

What are the products of the $I^A$ and $I^B$ alleles?

If the mother's blood group is $AB$ and the father's blood group is $O$,what will be the possible blood group$(s)$ of the child?

Can a child have blood group '$O$' if his parents have blood group '$A$' and '$B$'? Explain.

Which of the following characteristics is true for the control of blood groups in humans?

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