Results 31 to 40 of about 86,733 (210)

Genomic evidence reveals three W-autosome fusions in Heliconius butterflies.

PLoS Genetics
Sex chromosomes are evolutionarily labile in many animals and sometimes fuse with autosomes, creating so-called neo-sex chromosomes. Fusions between sex chromosomes and autosomes have been proposed to reduce sexual conflict and to promote adaptation and ...
Nicol Rueda-M, Carolina Pardo-Diaz, Gabriela Montejo-Kovacevich, W Owen McMillan, Krzysztof M Kozak, Carlos F Arias, Jonathan Ready, Shane McCarthy, Richard Durbin, Chris D Jiggins, Joana I Meier, Camilo Salazar   +11 more
doaj   +1 more source

Ever-young sex chromosomes in European tree frogs.

PLoS Biology, 2011
Non-recombining sex chromosomes are expected to undergo evolutionary decay, ending up genetically degenerated, as has happened in birds and mammals. Why are then sex chromosomes so often homomorphic in cold-blooded vertebrates?
Matthias Stöck, Agnès Horn, Christine Grossen, Dorothea Lindtke, Roberto Sermier, Caroline Betto-Colliard, Christophe Dufresnes, Emmanuel Bonjour, Zoé Dumas, Emilien Luquet, Tiziano Maddalena, Helena Clavero Sousa, Iñigo Martinez-Solano, Nicolas Perrin   +13 more
doaj   +1 more source

Bisection of the X chromosome disrupts the initiation of chromosome silencing during meiosis in Caenorhabditis elegans

Nature Communications, 2021
During meiosis, sex chromosomes show silenced gene expression that is disrupted when translocated to autosomes. Here, the authors engineer C. elegans with bisected X chromosomes and see active transcription in gonads, indicating continuity of sex ...
Yisrael Rappaport, Hanna Achache, Roni Falk, Omer Murik, Oren Ram, Yonatan B. Tzur   +5 more
doaj   +1 more source

BAZ1B is dispensable for H2AX phosphorylation on Tyrosine 142 during spermatogenesis

Biology Open, 2015
Meiosis is precisely regulated by the factors involved in DNA damage response in somatic cells. Among them, phosphorylation of H2AX on Serine 139 (γH2AX) is an essential signal for the silencing of unsynapsed sex chromosomes during male meiosis. However,
Tyler J. Broering, Yuan-Liang Wang, Ram Naresh Pandey, Rashmi S. Hegde, Shao-Chun Wang, Satoshi H. Namekawa   +5 more
doaj   +1 more source

Highly differentiated ZW sex microchromosomes in the Australian Varanus species evolved through rapid amplification of repetitive sequences. [PDF]

PLoS ONE, 2014
Transitions between sex determination systems have occurred in many lineages of squamates and it follows that novel sex chromosomes will also have arisen multiple times.
Kazumi Matsubara, Stephen D Sarre, Arthur Georges, Yoichi Matsuda, Jennifer A Marshall Graves, Tariq Ezaz   +5 more
doaj   +1 more source

Hypothyroidism and sex chromosomes. [PDF]

Journal of Medical Genetics, 1988
The observation of Campbell and Price in 1979 that their Unit had diagnosed four subjects with both Klinefelter's syndrome and congenital hypothyroidism raised the suspicion of an association between the two conditions. This, and the published reports of an XX male, five XXY males, and one mosaic XY/XXY with congenital or acquired forms of ...
C. Sarri, S. Pantelakis, G. B. Cote, I. Lambadaridis, C. H. Mengreli   +4 more
openaire   +3 more sources

Molecular sexing and population genetic inference using a sex-linked microsatellite marker in the nine-spined stickleback (Pungitius pungitius)

BMC Research Notes, 2011
Background Sex-specific DNA markers can serve as tools for molecular sex identification, as well as for population genetic inferences. We investigated the potential utility of a microsatellite marker located on sex chromosomes for molecular sexing of ...
Merilä Juha, Herczeg Gábor, Shikano Takahito   +2 more
doaj   +1 more source

Heteromorphic ZZ/ZW sex chromosomes sharing gene content with mammalian XX/XY are conserved in Madagascan chameleons of the genus Furcifer

Scientific Reports
Chameleons are well-known lizards with unique morphology and physiology, but their sex determination has remained poorly studied. Madagascan chameleons of the genus Furcifer have cytogenetically distinct Z and W sex chromosomes and occasionally Z1Z1Z2Z2 ...
Michail Rovatsos, Sofia Mazzoleni, Barbora Augstenová, Marie Altmanová, Petr Velenský, Frank Glaw, Antonio Sanchez, Lukáš Kratochvíl   +7 more
doaj   +1 more source

Natural triploidy in Leporinus cf. elongatus bearing sex chromosomes

Genetics and Molecular Biology, 2007
Although several cases of natural triploidy in fish have already been described, spontaneous polyploidy in species with differentiated sex chromosomes are rare. We report the occurrence of a triploid fish (3n = 81) Leporinus cf.
Wagner Franco Molina, Vladimir Pavan Margarido, Pedro Manoel Galetti Jr   +2 more
doaj   +1 more source

Genome-Wide Analysis of Transposable Elements and Satellite DNAs in Spinacia Species to Shed Light on Their Roles in Sex Chromosome Evolution

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, Xiaoyue Li, Jian Zhou, Li’ang Yu, Shufen Li, Yulan Zhang, Ruiyun Qin, Wujun Gao, Chuanliang Deng   +8 more
doaj   +1 more source