We hypothesized that genes in the sex determination pathway, or the Y chromosome, might control the observed sexual dimorphism of heterochromatin. Interphase chromosomes of Drosophila are paired throughout development [ 37 — 39 ].
This clock is found in a wide range of fly cells, but the clock-bearing cells that control activity are several dozen neurons in the fly's central brain.
We will then discuss the evidence that SXL also functions as a sex-specific modulator of Notch activity. Dynamic linkage relationships to the mating-type locus in automictic fungi of the genus Microbotryum. Nat Rev Mol Cell Biol. Intermediate gametes do worse than small ones in terms of mobility and numbers, and worse than large ones in terms of provisioning.
Rapid divergence and expansion of the X chromosome in papaya. Sex lethal controls dosage compensation in Drosophila by a non-splicing mechanism. Thank you for submitting a comment on this article.
Plant Cell Reports 30— Sxl is expressed in XX but not in XY animals. Montchamp-Moreau C Sex-ratio meiotic drive in Drosophila simulans : cellular mechanism, candidate genes and evolution. Article Navigation. The net effect of the sex-specific antagonism of Gro-mediated repression is that the two-fold difference in XSE dose is converted into a robust all-or-nothing response at SxlPe.
The establishment of sexual identity in the Drosophila germline.
Several genes with roles in sex determination have been found. Flies homozygous for each allele have light body and wing color 1,1. Not quite. Indeed, an analysis in fly heads revealed that most sex-biased gene regulation is not mediated by tra [ 61 ].
At later times, Sxl product made from this early promoter can prevent splicing to the male exon and allow the production of female-specific RNA.