$XO$ type of sex chromosomes determine male sex in grasshoppers. This type of sex-determination comes under $XX – XO$ type. It is common in cockroaches, grasshoppers and bugs. The female has two homomorphic sex chromosomes $X X$ and is homogametic. It produces similar eggs, each with one $X-$ chromosome. The male has one chromosome only and is heterogametic. It produces two types of sperms-gynosperms with $X$ and androsperms without $X$.

Other statements can be corrected as follows

In birds, the females are heterozygous and represented as $ZW.$

Female sex in humans is represented as $XX.$

In Drosophila, males are heterogametic, i.e, $XY.$