What is one molecular mechanism that dictates gender related behaviors in fruit
ID: 54243 • Letter: W
Question
What is one molecular mechanism that dictates gender related behaviors in fruit flies?
Early excessive X chromosome dosage results in transcription of Sxl which blocks U2AF/U2 causing the skipping of an exon containing a premature stop sequence.
Early excessive X chromosome dosage results in transcription of Sxl which binds to U2AF/U2 promoting transcription of an exon containing a premature stop sequence.
Early excessive X chromosome dosage inhibits tra which blocks dsx thereby including an exon containing a premature stop sequence.
Early excessive Y chromosome dosage results in transcription of Tra which binds to Sxl causing the skipping of an exon containing a premature stop sequencein Ds
Early excessive X chromosome dosage results in transcription of Sxl which blocks U2AF/U2 causing the skipping of an exon containing a premature stop sequence.
Early excessive X chromosome dosage results in transcription of Sxl which binds to U2AF/U2 promoting transcription of an exon containing a premature stop sequence.
Early excessive X chromosome dosage inhibits tra which blocks dsx thereby including an exon containing a premature stop sequence.
Early excessive Y chromosome dosage results in transcription of Tra which binds to Sxl causing the skipping of an exon containing a premature stop sequencein Ds
Explanation / Answer
The correct option is A.
Early excessive X chromosome dosage results in transcription of Sxl which blocks U2AF/U2 causing the skipping of an exon containing a premature stop sequence.
The female-specific protein from the Sxl gene activates a female-specific 3´ splice site in the transformer pre-mRNA, causing it to be processed in a way that splices out the second exon. To do this, the Sxl protein blocks the binding of splicing factor U2AF to the nonspecific splice site by specifically binding to the polypyrimidine tract adjacent to it.
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