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

CBSE BoardEnglish MediumSTD 12 ScienceBiologySTD 12 - 4. principal of inheritance and variation1 Mark
MCQ
The most important example of point mutation is found in a disease called
  • A
    Thalassemia
  • B
    Night blindness
  • C
    Down's syndrome
  • ✓
    Sickle-cell anaemia
✓

Answer

Correct option: D.
Sickle-cell anaemia
d
Sickle-cell anaemia is caused due to base replacement leading to replacement of sixth amino acid in the -chain. Glutamic acid is replaced by valine and causes sickle cell anaemia.

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