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

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If parents are heterozygous then child can have $\mathrm{O}$ blood group but if parents are homozygous then child cannot have $O$ blood group.f

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A gene showing codominance has

  • [NEET 2015]

Consider the following statement regarding $ABO$ blood group in human

$I.$ It is controlled by multiple allele

$II.$ It shows codominance

$III.$ Codominance can be manifested phenotypically in human

$IV.$ It follows the Mendel law of inheritance

Which of the following statements (s) are correct?

As per $\mathrm{ABO}$ blood grouping system, the blood group of father is $\mathrm{B}^{+}$, mother is $\mathrm{A}^{+}$and child is $\mathrm{O}^{+}$. Their respective genotype can be

Choose the most appropriate answer from the options given below :

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Mother and father both have blood group $‘A’$. They have two children one with blood group $‘O’$ and second one with blood group $‘A’$. They have

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Give differences : Incomplete dominance and Co-dominance