please choose the correct answer In the ABO bloodtype phenot

please choose the correct answer

In the ABO blood-type phenotype, which gene is the most epistatic?

a.) A

b.) B

c.) O

d.)I

e.) H

Solution

Answer is e) H- Epistasis is a product of gene- gene interaction. when one genes expression is controlled by other gene, it is called epistasis. H antigen is the precursor of A and B antigens