Question

ABO blood group system is due to

• A. Multifactor inheritance
• B. Incomplete dominance
• C. Multiple allelism
• D. Epistasis

Answer 1

The correct option is C Multiple allelism

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’.