A non-haemophilic couple was informed by their doctor that there is possibility of a haemophilic child be born to them. Explain the basis on which the doctor conveyed this information. Give the genotypes and the phenotypes of all the possible children who could be born to them.

Explanation

The couple themselves are non-haemophilic. Thus , the mother must be a carrier and father must be normal .
50% daughter normal (XX)
50% daughter carrier `(XcancelX)`
50% son normal (XY)
50% son haemophilic `cancel(XY)`