$A$ normal woman, whose father had colour blindness, married a normal man. What is the chance of occurrence of colour blindness in the progeny?
$A$ normal woman, whose father had colour blindness, married a normal man. What is the chance of occurrence of colour blindness in the progeny?
- A
$25\;\%$
- B
$50\;\%$
- C
$100\;\%$
- D
$75\;\%$
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