Hermaphrodite sex images
In addition, a homologue of dmd-1 exhibits male-specific expression in Schistosoma mansoni, a derived, dioecious flatworm.These results demonstrate conservation of the role of DM domain genes in sexual development in lophotrochozoans and suggest one means by which modulation of sex-specific pathways can drive the transition from hermaphroditism to dioecy..Here we show that a sex-specific gene, Smed-dmd-1 encoding a predicted doublesex/male-abnormal-3 (DM) domain transcription factor, is required for specification of male germ cells in a simultaneous hermaphrodite, the planarian Schmidtea mediterranea.
To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer).Somatic and germ cells were distinguishable owing to marked differences in the electron density of their cytoplasm and peripheral condensations of heterochromatin in the somatic cells (Fig. The somatic cells seen by TEM likely correspond to dmd-1-expressing cells.Consistent with this idea, the dmd-1-positive cells in the testes of mature sexual planarians did not express germ cell markers, including nanos, germinal histone H4 (ref.We also show that a homologue of dmd-1 exhibits sex-specific expression in S.
mansoni, a derived, dioecious flatworm, suggesting a means by which modulation of sex-specific pathways may drive the transition from hermaphroditism to dioecy.In addition, dmd-1 has a male-specific role in the maintenance and regeneration of the testes and male accessory reproductive organs.