EVERYDAY SCIENCE

Detailed explanation-1: -The gene responsible for the ABO blood group system is I. This gene exists in three allelic forms-IA, IB and i. IA and IB are dominant alleles and i is the recessive allele. Since, three alleles for ABO blood group are found in a population, it is an example of multiple allelism.

Detailed explanation-2: -Complete answer: ABO blood group is the best example of Codominance, Incomplete dominance and Dominance. Codominance – an expression of phenotypes of both parents is called codominance. Multiple allelism – Presence of greater than two alleles for a gene is called Multiple allelism.

Detailed explanation-3: -The ABO blood group system is one of the best examples of codominance. There are different types of red blood cells such as A, B, AB and O with or without the Rh factor. The difference is in the antigen present on the red blood cell surface which determines the specific blood group in an organism.

Detailed explanation-4: -Multiple Alleles Examples The most common examples of multiple alleles are the coat colour of rabbits, A, B, AB and O blood groups in humans and the eye colour in Drosophila.

Detailed explanation-5: -ABO blood grouping in human beings is controlled by three alleles namely IA, IB and IO. These are basically the three alternative forms (alleles) of the gene I. Hence it is an example for multiple allelism.