In which of the following crosses will the offspring show the greatest diversity in phenotypes?

  • A
    $I^A i$ and $I^B i$
  • B
    $I^A I^A$ and $I^B i$
  • C
    $I^A I^B$ and $ii$
  • D
    $I^A i$ and $I^A I^B$

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$A$ child has blood group $O$. If the father has blood group $A$ and mother has blood group $B$,work out the genotypes of the parents and the possible genotypes of the other offspring.

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Even if a character shows multiple allelism,an individual will only have two alleles for that character. Why?

$ABO$ blood grouping is controlled by gene $I$,which has three alleles and shows co-dominance. There are six genotypes. How many phenotypes in all are possible?

If one parent has blood group $A$ and the other parent has blood group $B$,what blood groups can the offspring have?

Which of the following is an example of multiple allelism?

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