Results 41 to 50 of about 2,151,922 (308)

Chromosome map of the Siamese cobra: did partial synteny of sex chromosomes in the amniote represent “a hypothetical ancestral super-sex chromosome” or random distribution?

BMC Genomics, 2018
Background Unlike the chromosome constitution of most snakes (2n=36), the cobra karyotype shows a diploid chromosome number of 38 with a highly heterochromatic W chromosome and a large morphologically different chromosome 2. To investigate the process of
Worapong Singchat, Rebecca E. O’Connor, Panupong Tawichasri, Aorarat Suntronpong, Siwapech Sillapaprayoon, Sunutcha Suntrarachun, Narongrit Muangmai, Sudarath Baicharoen, Surin Peyachoknagul, Lawan Chanhome, Darren Griffin, Kornsorn Srikulnath   +11 more
doaj   +1 more source

Sex chromosome turnover contributes to genomic divergence between incipient stickleback species. [PDF]

PLoS Genetics, 2014
Sex chromosomes turn over rapidly in some taxonomic groups, where closely related species have different sex chromosomes. Although there are many examples of sex chromosome turnover, we know little about the functional roles of sex chromosome turnover in
Kohta Yoshida, Takashi Makino, Katsushi Yamaguchi, Shuji Shigenobu, Mitsuyasu Hasebe, Masakado Kawata, Manabu Kume, Seiichi Mori, Catherine L Peichel, Atsushi Toyoda, Asao Fujiyama, Jun Kitano   +11 more
doaj   +1 more source

Identification of novel Z/W chromosome-specific markers from the giant freshwater prawn Macrobrachium rosenbergii

Aquaculture and Fisheries, 2023
The giant freshwater prawn (Macrobrachium rosenbergii) is a commercially cultured species in China. A sex chromosome-specific marker is crucial for sex identification and distinguishing sex chromosomes.
Xue Liu, Lingxia Zhou, Biyun Luo, Hongli Qian, Baoqing Ye, Keyi Ma, Gaofeng Qiu   +6 more
doaj   +1 more source

The multicopy gene Sly represses the sex chromosomes in the male mouse germline after meiosis. [PDF]

, 2009
Studies of mice with Y chromosome long arm deficiencies suggest that the male-specific region (MSYq) encodes information required for sperm differentiation and postmeiotic sex chromatin repression (PSCR).
Yamauchi, Yasuhiro, Julie Cocquet, Nabeel A Affara, Burgoyne, Paul S., Yasuhiro Yamauchi, Cocquet, Julie, Affara, Nabeel A., Mahadevaiah, Shantha K., Ellis, Peter J.I., Peter J I Ellis, Monika A Ward, Shantha K Mahadevaiah, Ward, Monika A., Paul S Burgoyne, Ellis Peter J. I., Cocquet Julie, Yamauchi Yasuhiro, Affara Nabeel A., Mahadevaiah Shantha K., Burgoyne Paul S., Ward Monika A.   +20 more
core   +1 more source

Evolution of a Multiple Sex-Chromosome System by Three-Sequential Translocations among Potential Sex-Chromosomes in the Taiwanese Frog Odorrana swinhoana

Cells, 2021
Translocation between sex-chromosomes and autosomes generates multiple sex-chromosome systems. It happens unexpectedly, and therefore, the evolutionary meaning is not clear.
Ikuo Miura, Foyez Shams, Si-Min Lin, Marcelo de Bello Cioffi, Thomas Liehr, Ahmed Al-Rikabi, Chiao Kuwana, Kornsorn Srikulnath, Yuya Higaki, Tariq Ezaz   +9 more
doaj   +1 more source

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 that somatic tissue- and testis- but not ovary-specific genes tend not to be located on the X ...
Wu Chung-I, Lu Xuemei
openaire   +3 more sources

Non-random chromosome positioning in mammalian sperm nuclei, with migration of the sex chromosomes during late spermatogenesis. [PDF]

, 2005
Chromosomes are highly organized and compartmentalized in cell nuclei. The analysis of their position is a powerful way to monitor genome organization in different cell types and states.
Foster, H, Bridger, JM, Foster, Helen A., Abeydeera, Lalantha R., Bridger, Joanna M., Griffin, DK, Abeydeera, L, Griffin, Darren K.   +7 more
core   +1 more source

Sex differences in obesity, lipid metabolism, and inflammation—A role for the sex chromosomes?

Molecular Metabolism, 2018
Background: Sex differences in obesity and related diseases are well established. Gonadal hormones are a major determinant of these sex differences. However, sex differences in body size and composition are evident prior to exposure to gonadal hormones ...
Temeka Zore, Maria Palafox, Karen Reue
doaj   +1 more source

Degenerated, Undifferentiated, Rearranged, Lost: High Variability of Sex Chromosomes in Geometridae (Lepidoptera) Identified by Sex Chromatin

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, Martina Dalíková, Pavel Potocký, Toomas Tammaru, Marharyta Trehubenko, Svatava Kubíčková, František Marec, Magda Zrzavá   +7 more
doaj   +1 more source

X chromosome inactivation during Drosophila spermatogenesis [PDF]

, 2007
Genes with male- and testis-enriched expression are under-represented on the Drosophila melanogaster X chromosome. There is also an excess of retrotransposed genes, many of which are expressed in testis, that have “escaped” the X chromosome and moved to ...
Baines, J., Hense, Winfried, Parsch, John, John Parsch, Baines, John F., Parsch John, Hense Winfried, Baines John F, Hense, W., John F Baines, Winfried Hense, Parsch, J.   +11 more
core   +2 more sources