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Solution 

In humans, when XY chromosomes are present, it is a male. When XX chromosomes are present,  it is a female.
While in Drosophila, the sex depends on the ratio of number of X chromosomes to the number of autosomes. (A)
If the X:A ratio is 1 it is a female 
If theX:A  ratio is 0.5 it is male 
If the X:A ratio is between 0.5 and 1 it is intersex 
If below 0.5 - metamale
If above 1 - metafemale

The predictions of the chromosomes are as follows -