Question
Explain co$-$dominance in humans with the help of example.
✓
Answer
$\rightarrow$ Co$-$dominance is a phenomenon in which two alleles express themselves independently when present together in an organism.
$\rightarrow$ Example: $ \text{ABO}$ Blood Group
$\rightarrow$ It is the inheritance in which both alleles of a gene are expressed in a hybrid. E.g. $ \text{ABO}$ blood grouping inhuman.
$\rightarrow$ $ \text{ABO}$ blood groups are controlled by the gene $I.$
$\rightarrow$ This gene controls the production of sugar polymers $($antigens$)$ that protrude from plasma membrane of $ \text{RBC}$.
$\rightarrow$ The gene $4$ has three alleles $I^A, I^B i.$
$\rightarrow$ $I^A$ and $I^B$ produce a slightly different form of the sugar while allele $i$ doesn't produce any sugar.
$\rightarrow$ When $I$ and $I$ are present together, they both express their own types of sugars. This is due to co$-$dominance.
$\rightarrow$ Example: $ \text{ABO}$ Blood Group
$\rightarrow$ It is the inheritance in which both alleles of a gene are expressed in a hybrid. E.g. $ \text{ABO}$ blood grouping inhuman.
$\rightarrow$ $ \text{ABO}$ blood groups are controlled by the gene $I.$
$\rightarrow$ This gene controls the production of sugar polymers $($antigens$)$ that protrude from plasma membrane of $ \text{RBC}$.
$\rightarrow$ The gene $4$ has three alleles $I^A, I^B i.$
$\rightarrow$ $I^A$ and $I^B$ produce a slightly different form of the sugar while allele $i$ doesn't produce any sugar.
$\rightarrow$ When $I$ and $I$ are present together, they both express their own types of sugars. This is due to co$-$dominance.
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