Why are human females rarely haemophilic? Explain, how do haemophilic patients suffer?

A carrier female for haemophilia marries a haemophilic man. With the help of Punnet square, show the types of progeny formed.

In human, males are heterogametic and females are homogametic, Explain. Are there any examples where males are homogametic and feamles heterogametic?

What is fertilization? In which part of the human female reproductive system does it occur? Explain the significance of fertililization.

Explain how the human ear works.

Mention the target cells of luteinising hormone in human males and females. Explain effect and the changes which the hormone induces in each case.