Results 11 to 20 of about 2,299,084 (348)
PLoS Biology, 2022 Many organisms have sex chromosomes with large nonrecombining regions that have expanded stepwise, generating “evolutionary strata” of differentiation. The reasons for this remain poorly understood, but the principal hypotheses proposed to date are based
P. Jay +3 more
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Recurrent chromosome reshuffling and the evolution of neo-sex chromosomes in parrots
bioRxiv, 2021 The karyotype of most birds has remained considerably stable during more than 100 million years’ evolution, except for some groups, such as parrots. The evolutionary processes and underlying genetic mechanism of chromosomal rearrangements in parrots ...
Zhen Huang +17 more
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Philosophical Transactions of the Royal Society of London. Biological Sciences, 2021 Several hypotheses explain the prevalence of undifferentiated sex chromosomes in poikilothermic vertebrates. Turnovers change the master sex determination gene, the sex chromosome or the sex determination system (e.g. XY to WZ). Jumping master genes stay
Heiner Kuhl +26 more
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A neutral model for the loss of recombination on sex chromosomes
Philosophical Transactions of the Royal Society of London. Biological Sciences, 2021 The loss of recombination between sex chromosomes has occurred repeatedly throughout nature, with important implications for their subsequent evolution.
Daniel L. Jeffries +3 more
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The Diversity and Evolution of Sex Chromosomes in Frogs
Genes, 2021 Frogs are ideal organisms for studying sex chromosome evolution because of their diversity in sex chromosome differentiation and sex-determination systems.
Wen-Juan Ma, P. Veltsos
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Robertsonian fusion triggers recombination suppression on sex chromosomes in Coleonyx geckos
Scientific Reports, 2023 The classical hypothesis proposes that the lack of recombination on sex chromosomes arises due to selection for linkage between a sex-determining locus and sexually antagonistic loci, primarily facilitated by inversions.
Artem Lisachov +10 more
doaj +1 more source
Cells, 2023 Geckos are an excellent group to study the evolution of sex determination, as they possess a remarkable variability ranging from a complete absence of sex chromosomes to highly differentiated sex chromosomes.
Eleonora Pensabene +3 more
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Philosophical Transactions of the Royal Society of London. Biological Sciences, 2021 Despite decades of cytogenetic and genomic research of dynamic sex chromosome evolution in teleost fishes, multiple sex chromosomes have been largely neglected.
A. Sember +5 more
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When and how do sex‐linked regions become sex chromosomes?
Evolution; international journal of organic evolution, 2021 The attention given to heteromorphism and genetic degeneration of “classical sex chromosomes” (Y chromosomes in XY systems, and the W in ZW systems that were studied first and are best described) has perhaps created the impression that the absence of ...
D. Charlesworth
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Sex chromosome evolution among amniotes: is the origin of sex chromosomes non-random?
Philosophical Transactions of the Royal Society of London. Biological Sciences, 2021 Sex chromosomes are a great example of a convergent evolution at the genomic level, having evolved dozens of times just within amniotes. An intriguing question is whether this repeated evolution was random, or whether some ancestral syntenic blocks have ...
L. Kratochvíl, T. Gamble, M. Rovatsos
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