Identify the wrong statement with reference to the gene ' I ' that controls ABO blood groups.
and 
are present together, they express same type of sugar.
Text Solution
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ABO blood groups are controlled by the gene I. The gene I has three alleles 
and i . The alleles 
and 
produce a slightly different form of the sugar while allele i does not produce any sugar. Because humans are diploid organisms, each person possess any two of the three 'I' gene alleles. IN and 
are completely dominant over 
, but when 
and 
are present together, they both express their own types of sugar, thus, behaving as codominant alleles.
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