Question

Identify the wrong statement for ABO blood grouping in human beings.

• A. Blood group AB have both the antigens
• B. Six genotypes and four phenotypes are possible
• C. Allele i produce O type of sugar
• D. Gene I has 3 alleles

Answer 1

The correct option is C Allele i produce O type of sugar

Allele i does not produce any type of sugar. Gene i has 3 alleles I${}^A$, I${}^B$ and I, that forms 6 genotypes and 4 phenotypes. Blood group AB have both the antigens (A and B type).