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Sex, sex chromosomes and gene expression [PDF]
BMC Biology, 2011 The X chromosome has fewer testis-specific genes than autosomes in many species. This bias is commonly attributed to X inactivation in spermatogenesis but a recent paper in BMC Biology provides evidence against X inactivation in Drosophila and proposes ...
Wu Chung-I, Lu Xuemei
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Sex-biased expression of sex-linked transcripts in spiny frogs with homomorphic sex chromosomes [PDF]
BMC GenomicsBackground The accumulation of sexually antagonistic mutations on chromosomes has been favored in driving the evolution of sex chromosomes. However, empirical evidence has been limited to species with heteromorphic sex chromosomes, where the patterns of ...
Yu Xiao, Yun Xia, Xiaomao Zeng
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Sex determination without sex chromosomes [PDF]
Philosophical Transactions of the Royal Society B: Biological Sciences, 2021 With or without sex chromosomes, sex determination is a synthesis of many molecular events that drives a community of cells towards a coordinated tissue fate. In this review, we will consider how a sex determination pathway can be engaged and stabilized without an inherited genetic determinant.
Ceri Weber, Blanche Capel
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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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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
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Cold Spring Harbor Perspectives in Biology, 2014 Sex chromosome drivers are selfish elements that subvert Mendel's first law of segregation and therefore are overrepresented among the products of meiosis. The sex-biased progeny produced then fuels an extended genetic conflict between the driver and the rest of the genome.
Helleu, Quentin +2 more
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Sex Chromosome Evolution in Muscid Flies
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
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B chromosomes have a functional effect on female sex determination in Lake Victoria cichlid fishes. [PDF]
PLoS Genetics, 2011 The endemic cichlid fishes in Lake Victoria are a model system for speciation through adaptive radiation. Although the evolution of the sex-determination system may also play a role in speciation, little is known about the sex-determination system of ...
Kohta Yoshida +10 more
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Comparative sex chromosome genomics in snakes: differentiation, evolutionary strata, and lack of global dosage compensation. [PDF]
PLoS Biology, 2013 Snakes exhibit genetic sex determination, with female heterogametic sex chromosomes (ZZ males, ZW females). Extensive cytogenetic work has suggested that the level of sex chromosome heteromorphism varies among species, with Boidae having entirely ...
Beatriz Vicoso +4 more
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Frontiers in Ecology and Evolution, 2022 Heteropteran insects exhibit a remarkable diversity of meiotic processes, including coexistence of different chromosomes types with different behavior during the first meiotic division, non-chiasmatic segregation, and inverted meiosis.
María Ayelen Toscani +3 more
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