If two individuals with AB blood group marry | vedclass

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(A) The $ABO$ blood grouping in humans is controlled by the gene $I$. The gene $I$ has three alleles $I^A$,$I^B$,and $i$. When $I^A$ and $I^B$ are pre

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Codominance

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(A) The $ABO$ blood grouping in humans is controlled by the gene $I$. The gene $I$ has three alleles $I^A$,$I^B$,and $i$. When $I^A$ and $I^B$ are present together,they both express their own types of sugars (antigens) because of codominance. In the given cross,both parents have $AB$ blood group (genotype $I^A I^B$). The cross $I^A I^B 	imes I^A I^B$ results in offspring with genotypes $I^A I^A$ ($A$ blood group),$I^A I^B$ ($AB$ blood group),and $I^B I^B$ ($B$ blood group) in the ratio $1:2:1$. Since both alleles $I^A$ and $I^B$ are expressed equally in the $AB$ phenotype,this is an example of codominance.

If two individuals with $AB$ blood group marry and have a large number of children,the children show $A$,$AB$,and $B$ blood groups in a ratio of $1:2:1$. Since proteins of both $A$ and $B$ types are present in individuals with $AB$ blood group,this is an example of:

Similar Questions

When two genes with independent expression are present together, they both express their characteristics, and when they are separate, they express their individual characteristics. This phenomenon is observed in which of the following?

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