Hemophilia is a sex-linked trait. A hemophilic man, whose father was normal, marries a woman whose...

Hemophilia is a sex-linked trait. A hemophilic man, whose father was normal, marries a woman whose father had hemophilia and whose mother was heterozygous for hemophilia. What are the chances that their son will have hemophilia? A daughter will have hemophilia? (Since there are two possibilities for the mother, you must use the data from two Punnett Squares to answer these questions.)

Mr. X has been accused by Miss Z of fathering her child. The child's blood type is AB and Miss Z's blood type is A. Mr. X could be the father if he has what blood type(s)? Mr. X could NOT be the father if he has what blood types?

Expert Solution

Ans) in case when mother is heterozygous normal than probability of daughter Being haemophilic is 50% or1/2

In case when mother is haemophilic then probability of daughter being haaemophilic is 100% or 1.

Explaination:

Ansb)

If Mr X is the father of child with AB blood group Then mr X will either have AB blood gp so when he mated with A blood gp female IB allele contributed From mr X and IA alllele from mother so progeny will be AB. Or mr X have B blood gp so he contribute IB allele and female contributeIA blood gp and child with IAIB genotype produced.

If mr X is not the father of child with AB blood gp then mr X blood gp must be either O type or A type.

gladiator answered 2 years ago

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