Results 1 to 10 of about 2,151,922 (308)

Sex and neo-sex chromosome evolution in beetles.

PLoS Genetics
Beetles 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, Anita Tran, Kamalakar Chatla, Doris Bachtrog   +3 more
doaj   +2 more sources

High degree of sex chromosome differentiation in stickleback fishes

BMC Genomics, 2011
Background Studies of closely related species with different sex chromosome systems can provide insights into the processes of sex chromosome differentiation and evolution.
Shimada Yukinori, Natri Heini M, Shikano Takahito, Merilä Juha   +3 more
doaj   +1 more source

Delayed Diagnosis of 48, XXYY Syndrome in an Adult Male Presenting with Severe Insulin Resistance and Hypergonadotropic Hypogonadism: A Case Report [PDF]

Journal of Clinical and Diagnostic Research
A 48,XXYY syndrome is a rare sex chromosome aneuploidy affecting 1 in 18,000 to 50,000 male births. While metabolic dysfunction is a recognised feature, most adult cases are identified during evaluations for cognitive difficulties, delayed puberty, or ...
Buddha Sai Krishna, K Arun, V Jayakaran, Abinaya Venkateshan, Mathisha Ebby Perrin   +4 more
doaj   +1 more source

Sex Chromosome Evolution, Heterochiasmy, and Physiological QTL in the Salmonid Brook Charr Salvelinus fontinalis

G3: Genes, Genomes, Genetics, 2017
Whole-genome duplication (WGD) can have large impacts on genome evolution, and much remains unknown about these impacts. This includes the mechanisms of coping with a duplicated sex determination system and whether this has an impact on increasing the ...
Ben J.G. Sutherland, Ciro Rico, Céline Audet, Louis Bernatchez   +3 more
doaj   +1 more source

X1X1X2X2/X1X2Y sex chromosome systems in the Neotropical Gymnotiformes electric fish of the genus Brachyhypopomus

Genetics and Molecular Biology, 2015
Several types of sex chromosome systems have been recorded among Gymnotiformes, including male and female heterogamety, simple and multiple sex chromosomes, and different mechanisms of origin and evolution.
Adauto Lima Cardoso, Julio Cesar Pieczarka, Cleusa Yoshiko Nagamachi   +2 more
doaj   +1 more source

Rapid chromosome evolution and acquisition of thermosensitive stochastic sex determination in nematode androdioecious hermaphrodites

Nature Communications
The factors contributing to evolution of androdioecy, the coexistence of hermaphrodites and males such as in Caenorhabditis elegans, remains poorly known.
Kohta Yoshida, Hanh Witte, Ryo Hatashima, Simo Sun, Taisei Kikuchi, Waltraud Röseler, Ralf J. Sommer   +6 more
doaj   +1 more source

Transcriptomic signatures of rare variant impacts across sex and the X chromosome

HGG Advances
Summary: The human X chromosome contains hundreds of genes and has well-established impacts on sex differences and traits. However, the X chromosome is often excluded from many genetic analyses, limiting broader understanding of variant effects.
Rachel A. Ungar, Taibo Li, Nikolai G. Vetr, Nicole Ersaro, Alexis Battle, Stephen B. Montgomery   +5 more
doaj   +1 more source

Meiotic dynamics in a unique Australian marsupial provide new insights into the evolution of neo-sex chromosomes in the early stages of differentiation

Frontiers in Cell and Developmental Biology
Understanding the origin and fate of sex chromosomes has been one of the most intriguing questions in biology. In therian (marsupial and eutherian) mammals, most species are characterized by a heteromorphic XX female XY male sex chromosome system.
Laia Marín-Gual, Laia Marín-Gual, Carolyn J. Hogg, J. King Chang, Andrew J. Pask, Marilyn B. Renfree, Paul D. Waters, Aurora Ruiz-Herrera, Aurora Ruiz-Herrera   +8 more
doaj   +1 more source

The rate of W chromosome degeneration across multiple avian neo-sex chromosomes

Scientific Reports
When sex chromosomes evolve recombination suppression, the sex-limited chromosome (Y/W) commonly degenerate by losing functional genes. The rate of Y/W degeneration is believed to slow down over time as the most essential genes are maintained by ...
Hanna Sigeman, Philip A. Downing, Hongkai Zhang, Bengt Hansson   +3 more
doaj   +1 more source

The peculiar properties of pericentromeric regions of genomes and their influence on sex chromosome evolution. [PDF]

PLoS Genet
Charlesworth D.
europepmc   +1 more source