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

In $Drosophila$,the $XXY$ condition results in a female,whereas in humans,the same condition results in a male with $Klinefelter's$ syndrome. This proves that:

In $Drosophila$,the sex index ratio for a super female is ....

Describe the process of sex determination in humans.

$A$ male child would be born to parents if

Which one of the following conditions correctly describes the manner of determining the sex?