$A$ $XXY$ genotype in Drosophila is a female,whereas in humans,it is an abnormal male. This indicates that...

  • A
    $Y$ chromosome is essential for sex determination in Drosophila.
  • B
    $Y$ chromosome is female-determining in Drosophila.
  • C
    $Y$ chromosome is the male-determining factor in humans.
  • D
    $Y$ chromosome has no role in sex determination in either Drosophila or humans.

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