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

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYSTD 12 - 4. principal of inheritance and variation1 Mark
MCQ
Physical, psychomotor and mental development is retarted in an individual affected with
  • ✓
    Down's syndrome
  • B
    Sickle cell-anaemia
  • C
    Turner's syndrome
  • D
    Colour blindness
✓

Answer

Correct option: A.
Down's syndrome
a
Trisomy of $21$ chromosome

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