In addition to controlling somatic sexual development in Drosophila melanogaster, the Sex-lethal (Sxl) gene is required for proper differentiation of female germ cells. To investigate its role in germ-line development, we have examined the expression of Sxl in wild-type ovaries and ovaries that ar...
Bmdsx produces alternatively spliced mRNA isoforms that encode sex specific transcription factors as observed in dsx . While the female-specific splicing of dsx is activated by splicing activators, Tra and Tra2, the female splicing of Bmdsx represents the default mode. Instead, a splicing inhibitor...
Meiosis is a specialized process that produces haploid gametes from diploid cells by a single round of DNA replication followed by two successive cell divisions. It contains many special events, such as programmed DNA double-strand break (DSB) formation, homologous recombination, crossover formation ...
These results indicate that SCD in both mating type cells is induced by high molecular weight sex pheromones and that the roles of gametangial cells in the process of conjugation differ by sex. 展开 关键词: Closterium conjugation gametangial cell pheromone sexual cell division sexual reproduction ...
The success of sexual reproduction in mammals depends on segregation of the male sex chromosomes, X and Y, during the cell division process that produces gametes (meiosis). This requires that in male germ cells, the X and Y chromosomes r... RS Hawley - 《Science》 被引量: 0发表: 2011年...
The pheromone receptors inhibit the pheromone response pathway in Saccharomyces cerevisiae by a process that is independent of their associated G alpha pro... Dominant mutations at the DAF2 locus confer resistance to the cell-cycle arrest that normally occurs in MATa cells exposed to alpha-factor....
(1) The so-called 'luteal' cells of the ovary are derived from the medullary cords of the embryo, as previously shown by Firket and Nonidez. The process, which appears to be a peculiar form of fatty infiltration, begins about the elevent... Honor,B.,Fell - 《Journal of Experimental...
HPVs probably infect individual groups of cells of the undifferentiated reserve cell (basal cell) layer where they can remain latent for longer periods of time. As in squamous cervical intraepithelial neoplasia (CIN), but apparently much less often than in CIN, first individual cells and than ...
Acute pancreatitis presents clinically as a sudden inflammatory disorder of the pancreas and is caused by premature intracellular activation of pancreatic proteases leading to (i) self-destruction of acinar cells and (ii) auto digestion of the organ. Necrotic cell debris resulting from this process p...
The success of sexual reproduction in mammals depends on segregation of the male sex chromosomes, X and Y, during the cell division process that produces gametes (meiosis). This requires that in male germ cells, the X and Y chromosomes reliably pair and exchange genetic material (1). This pr...