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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
All sons of a couple are colourblind because
  • ✓
    Mother is homozygous colourblind
  • B
    Mother is heterozygous and father normal
  • C
    Mother is heterozygous and father colourblind
  • D
    Mother is normal and father colourblind
✓

Answer

Correct option: A.
Mother is homozygous colourblind
a
(a)Whenever mother is homozygous colour blind, all her sons will be colourblind irrespective of their father's nature.

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