Genes located on the $Y$ chromosome in males are called ........

Which of the following organisms produce two types of gametes?

$(a)$ 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.

$A$ family has five girls and no son. What is the probability of having a son as the $6^{th}$ child (in $\%$)?

Henking observed that in a few male insects,$50 \%$ of the sperm received a specific nuclear structure known as $X$-body,whereas the other $50 \%$ of sperms did not receive it. This method of sex determination was:

Number of autosomes in a normal human female is