All the sons of a colour-blind woman will be coloured blind regardless of the state…

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Biology JAMB 1995

All the sons of a colour-blind woman will be coloured blind regardless of the state of the father because

  • the egg determines the phenotype of the son
  • sons inherit the sex chromosome of their mothers
  • the father's sex chromosomes is weaker in sons
  • sex-linked traits express dominance in females checkmark

The correct answer is: D

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