Genetic sex determination mechanisms and evolution

Article Abstract:

The sex determination mechanisms of the fruit fly Drosophila melanogaster, the nematode Caenorhabditis elegans and the mouse, which are superficially similar but have different molecular and cellular bases, give an evolutionary perspective of sex determination in animals. Cybernetic convergence, or the arrival at similar solutions to the problems brought about by sexual differentiation using diverse molecular mechanisms, is a term used to describe the phenomenon. Further studies of other animals may reveal other cases of cybernetic convergence in regulatory mechanisms.

Analysis, Mice, Mice (Rodents), Caenorhabditis elegans, Varieties, Sex determination, Genetic, Sex determination (Genetics), Dosage compensation (Genetics), Sex differentiation

---

Evolution of the vertebrate Hox homeobox genes

Article Abstract:

Studies show that the Drosophila homeotic complex and vertebrate Hox homeobox gene complexes share colinear and homologous relationships, indicating that they share a common evolutionary origin. Further evidence suggests that the genes form part of a molecular mechanism specifying regional diversity along the anteroposterior axis of the embryo, and this has sparked interest in the functional requirements which have motivated the conservation of these genes in the evolution of vertebrates.

Research, Vertebrates, Evolution (Biology), Homology (Biology), Homeobox genes

---

Another notch in stem cell biology: Drosophila intestinal stem cells and the specification of cell fates

Article Abstract:

A study conducted to show that multipotent Drosophila intestinal stem cells (ISCs) modulate the Notch signaling route in their adjacent daughter cells to indicate the differentiated lineages of their descendants, in absence of an obvious stem cell niche, is presented. The empirical remarks on Drosophila result in testing and progressing the understanding of stem cell biology.

Physiological aspects, Stem cell research

Similar abstracts:

• Abstracts: Reversible expression of motility and flagella in Clostridium chauvoei and their relationship to virulence. Frozen motion of gliding bacteria outlines inherent features of the motility apparatus
• Abstracts: P element transposition in Drosophila melanogaster: an analysis of sister-chromatid pairs and the formation of intragenic secondary insertions during meiosis
• Abstracts: Isolation of Pseudomonas picketti strains that degrade 2,4,6-trichlorophenoland their dechlorination of chlorophenols
• Abstracts: Sexual isolation and cuticular hydrocarbons in Drosophila elegans. Molecular population divergence and sexual selection on morphology in the banded demoiselle (Calopteryx splendens)
• Abstracts: Human biology and aging: recent advances and new directions. Beard vs. forehead, ten years later

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.