ABO blood group system is due to A. Multifactor inheritance B. Incomplete dominance C. Multiple allelism D. Epistasis
Correct option is C) A.Multifactor inheritance – it is also called polygenic inheritance. Controlling of a character by two or more genes is called Multifactor inheritance. Eg:Sickle cell anaemia. B.Incomplete dominance – Appearance of new phenotypes in the progeny not either of the parents is called Incomplete dominance. Eg: Snapdragon. C.Multiple allelism – Presence of more than one alternative forms to a gene is called multiple allelsim. Eg:ABO blood group system. D.Epsitasis – A gene which masks the action of another gene is termed epistatic gene and the process is called epistasis. Eg: mice skin colour. So, the correct option is ‘Multiple allelism’.
