Why are grasshopper and Drospphila said to show male heterogamity? Explain

1.Why are grasshopper and Drospphila said to show male heterogamity? Explain.
2. Explain female heterogamity with the help of an example.
or
Write the types of sex-determinations mechanisms the following crosses show.Give an example of each type.

  1. Female XX with Male XO
  2. Female ZW with Male ZZ
  1. In grasshopper males have one X only in Drosophila males have one X and one Y.Males in both produce 2 different kinds of gametes so heterogametic.
  2. In birds female has ZW, produce two kinds of gametes and so heterogametic.
    OR
  3. Male heterogamity, Grasshopper.
  4. Female heterogamity, Birds.