$ZW-ZZ$ type of sex determination is seen in . . . . . . .

Which chromosomal condition is observed in male grasshoppers?

Which of the following symbols is used to represent the sex chromosomes in birds?

What is true in the case of honey bees?

$A$ fruit fly is heterozygous for a sex-linked gene. It is crossed with a normal female fruit fly. The specific chromosome for the male enters the egg in the ratio of ............. (in $: 1$)

$A$ man can inherit his $X$-chromosome from his