First slide

Pleiotropy

Question

The best example for pleiotropy is:

Easy

A

ABO Blood group
B

Skin colour
C

Phenylketoneuria
D

Colour Blindness

Solution

Pleiotropic gene can exhibit multiple phenotypic expression. An example of pleiotropy is the disease phenylketonuria, which occurs in humans.
ABO blood group – Multiple allelism, Co-dominanace
Skin colour in humans – Polygenic inheritance
Colour blindness – Mendelian disorder

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