Why are Grasshopper.and Drosophila said to show male heterogamety? Explain.

Explanation

(a) Grasshopper is XO type of sex determination males have: AA + XO i.e. one X chromosomes female have AA + XX pair of X chromosomes. (b) Drosophila shows XY type of sex determination. Males have-XY i.e. one X and one Y chromosome (males are heterogametic).Females have-XX i.e. pair of X chromosome (Female are hamogametic). In grasshopper

Both the above cases produce disssimilar gametes in males and sex determination depends on males.