First slide

Inheritance of One Gene

Question

Multiple allelism and co-dominance are associated with

Easy

A

Starch branching gene in pea
B

ABO blood group system
C

Phenylketonuria
D

Flower colour in Snapdragon

Solution

ABO blood group system in humans is controlled by an (I) gene having multiple alleles ( $I^{A}, I^{B}$ and i) and the genotype $I^{A} I^{B}$ shows co-dominance.
Starch branching gene in pea is an example of pleiotropic gene.
Phenylketonuria is an example of pleiotropy.
Flower colour in Snapdragon show incomplete dominance.

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