Number of autosomal chromosomes in Drosophila.

What type of sex determination is observed in grasshoppers?

Usually,the recessive character is expressed only when present in a double recessive condition. However,a single recessive gene can express itself in human beings when the gene is present on

In $Drosophila$,the sex is determined by

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

In chickens,which of the following is responsible for sex determination?