In regards to Dropsophila sex determination how does the number of X chromosomes affect the cell?
A) The SxI promoter is responsive to levels of transcription factors produced from genes on the X chrpomosome.
B) The SxI promoter is responsive to levels of transcription factors produced from genes on the Y chrpomosome.
C) The X chromosome produces a single transcription factor that results in a male if at a low concentration and a female in a high concentration
D) The SxI promoter is repressed by levels of transcription factors thata re produced from genes on the X chromosome.
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