In Drosophila 1 What would happen if both Sxlpe and Sxlpm we

In Drosophila

1. What would happen if both Sxl/pe and Sxl/pm were turned off?

2. What would happen if Sxl/pe was replaced with Sxl/pm and was turned on?

3. What would happen if after the early Sxl protein in female develops but there would be no feedback look?

XX Se lethal establishment Sex-lethal maintenance promoter promoter (Sxlpm) early Sxl late Sx protein protein productive RNA Splicing trigger to start feedback loop Female Sex-lethal establishment Sex-lethal maintenance promoter (Sn/P promoter (Sxpm) no early Sxl protein nonproductive splicing RNA no late Sxlprotein d Male

Solution

in Drosophila, the presence of late Sxl protein gives rise to female whereas the absence of this protein represents maleness. OR late Sxl protein contributes to femaleness.

1. if both the genes were turned off, there would be no late Sxl protein. absence indicates maleness. OR absence indicates no femaleness.

2. when establishment promoter is replaced with maintenance promoter, there would be no early Sxl protein and therefore no late Sxl protein. Hence, maleness.

3. if there is no late Sxl protein, it corresponds to maleness