Results 1 to 10 of about 4,675,098 (246)
Sex and neo-sex chromosome evolution in beetles.
PLoS GeneticsBeetles are the most species-rich group of animals and harbor diverse karyotypes. Most species have XY sex chromosomes, but X0 sex determination mechanisms are also common in some groups.
Ryan Bracewell +3 more
doaj +4 more sources
Sex Chromosome Evolution in Muscid Flies [PDF]
G3: Genes, Genomes, Genetics, 2020 Sex chromosomes and sex determining genes can evolve fast, with the sex-linked chromosomes often differing between closely related species. Population genetics theory has been developed and tested to explain the rapid evolution of sex chromosomes and sex
Richard P. Meisel +5 more
doaj +3 more sources
Evolution of Sex Chromosomes in Insects [PDF]
Annual Review of Genetics, 2010 Sex chromosomes have many unusual features relative to autosomes. Y (or W) chromosomes lack genetic recombination, are male- (female-) limited, and show an abundance of genetically inert heterochromatic DNA but contain few functional genes. X (or Z) chromosomes also show sex-biased transmission (i.e., X chromosomes show female-biased and Z-chromosomes
Doris Bachtrog, Vera B Kaiser
exaly +3 more sources
Cells, 2021 Sex determination directs development as male or female in sexually reproducing organisms. Evolutionary transitions in sex determination have occurred frequently, suggesting simple mechanisms behind the transitions, yet their detail remains elusive. Here
Peta Hill +4 more
doaj +1 more source
Frontiers in Plant Science, 2021 Sex chromosome evolution has mostly been studied in species with heteromorphic sex chromosomes. The Spinacia genus serves as an ideal model for investigating evolutionary mechanisms underlying the transition from homomorphic to heteromorphic sex ...
Ning Li +8 more
doaj +1 more source
Evolution of sex chromosomes in Sauropsida [PDF]
Integrative and Comparative Biology, 2008 Reptiles (sauropsids) represent the sister group to mammals, and the basal members of Reptilia may provide a good model for the condition of the common ancestor of both groups. Sex-determining mechanisms (SDM) and organizations of sex chromosomes among genotypically sex-determining (GSD) species vary widely across reptiles.
Christopher L, Organ, Daniel E, Janes
openaire +2 more sources
The Diversity and Evolution of Sex Chromosomes in Frogs [PDF]
Genes, 2021 Frogs are ideal organisms for studying sex chromosome evolution because of their diversity in sex chromosome differentiation and sex-determination systems. We review 222 anuran frogs, spanning ~220 Myr of divergence, with characterized sex chromosomes, and discuss their evolution, phylogenetic distribution and transitions between homomorphic and ...
Wen-Juan Ma, Paris Veltsos
openaire +4 more sources
Snake W Sex Chromosome: The Shadow of Ancestral Amniote Super-Sex Chromosome
Cells, 2020 Heteromorphic sex chromosomes, particularly the ZZ/ZW sex chromosome system of birds and some reptiles, undergo evolutionary dynamics distinct from those of autosomes. The W sex chromosome is a unique karyological member of this heteromorphic pair, which
Worapong Singchat +6 more
doaj +1 more source
Frontiers in Genetics, 2020 Squamate reptile chromosome 2 (SR2) is thought to be an important remnant of an ancestral amniote super-sex chromosome, but a recent study showed that the Siamese cobra W sex chromosome is also a part of this larger ancestral chromosome.
Worapong Singchat +16 more
doaj +1 more source
Cells, 2021 Sex chromatin is a conspicuous body that occurs in polyploid nuclei of most lepidopteran females and consists of numerous copies of the W sex chromosome.
Martina Hejníčková +7 more
doaj +1 more source