In which type of sex determination do both male and female have the same number of chromosomes?

$A$ family has five daughters and is expecting a sixth child. What is the probability of it being a boy?

In our society,women are often blamed for producing female children. Choose the correct answer regarding sex determination in humans.

While solving the problem of sex determination in a large number of insects,it was observed that

$(a)$ In humans,males are heterogametic and females are homogametic. Explain. Are there any examples where males are homogametic and females heterogametic?
$(b)$ Also describe as to who determines the sex of an unborn child? Mention whether temperature has a role in sex determination.

Assertion : In humans,the gamete contributed by the male determines whether the child produced will be male or female.
Reason : Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on $X-$ chromosome and some on $Y-$ chromosome.