• One of the daughters will be colour-blind but another daughter and son will be normal.

  • Only the son will be colour-blind

  • Both the daughters will be colour-blind but the son will be normal.

  • One of the daughters will be colour-blind and the other normal, but the son has only 50% chance of being normal.


One of the daughters will be colour-blind and the other normal, but the son has only 50% chance of being normal.

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