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STD 12 - 4. principal of inheritance and variation — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYSTD 12 - 4. principal of inheritance and variation1 Mark
MCQ
The best example for pleiotropy is
  • A
    $ABO$ Blood group
  • B
    Skin colour
  • ✓
    Phenylketoneuria
  • D
    Colour Blindness
✓

Answer

Correct option: C.
Phenylketoneuria
c
Pleiotropic gene can exhibit multiple phenotypic expression.

An example of this is the disease phenylketonuria.

ABO blood group- Multiple allelism

Skin colour- Shows polygenic inheritance

Colour blindness $-$ Mendelian disorder

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