Biology · Oct / Nov 2019 · Paper 12 · Question 39
5090Inheritance
The diagram shows a family tree in which hereditary night-blindness occurs. [family tree diagram with individuals 1-9 and key] What is the chance that unborn child, 9, will be a male with night-blindness?
- A1 in 2
- B1 in 4
- C1 in 8
- D3 in 4
As printed in the paper
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Correct answer: C. 1 in 8
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