*  CSHLPress.com
... on the part of the Y chromosome that does not undergo recombination to significantly update and refine the Y chromosome ... Electrophoresis of RNA, Avian Imaging featured in June's Cold Spring Harbor Protocols 06/01/2010. COLD SPRING HARBOR, N.Y. ( ... Researchers find chemical tag that locks chromosomes together during meiosis 11/30/2016. A Harvard Medical School news release ... Platypus genome unravels mysteries of mammalian evolution 05/07/2008. Genome Research is publishing several papers related to ...
  https://cshlpress.com/press.tpl?cart=1502602568349881180
*  ZW sex-determination system - Wikipedia
"In the platypus a meiotic chain of ten sex chromosomes shares genes with the avian Z and mammalian X chromosomes". Nature. 432 ... XY sex-determination system X0 sex-determination system Temperature-dependent sex determination X chromosome Y chromosome ... loci that eventually developed into the respective sex chromosomes once the recombination between the chromosomes (X and Y or Z ... The platypus has a ten-chromosome-based system, where the chromosomes form a multivalent chain in male meiosis, segregating ...
  https://en.wikipedia.org/wiki/ZW_sex-determination_system
*  Y chromosome - Wikipedia
Platypus sex chromosomes in fact appear to bear a much stronger homology (similarity) with the avian Z chromosome, and the SRY ... The older estimate was based on erroneous reports that the platypus X chromosomes contained these sequences. Recombination ... 2008). "Bird-like sex chromosomes of platypus imply recent origin of mammal sex chromosomes". Genome Research. 18 (6): 965-973 ... 2004). "In the platypus a meiotic chain of ten sex chromosomes shares genes with the bird Z and mammal X chromosomes". Nature. ...
  https://en.wikipedia.org/wiki/Y_chromosome
*  Dosage compensation - Wikipedia
... arm of the chromosome. The compensated (silenced) genes on Zp resemble a region on the primitive platypus sex chromosome, ... "Evolution of the avian sex chromosomes from an ancestral pair of autosomes". Proceedings of the National Academy of Sciences of ... active expression at some loci is required for homologous recombination with the pseudo-autosomal region (PAR) of the Y ... As such, scientists refer to bird sex chromosomes as a ZW sex-determining system, with males possessing two Z chromosomes, and ...
  https://en.wikipedia.org/wiki/Dosage_compensation
*  List of organisms by chromosome count - Wikipedia
"The multiple sex chromosomes of platypus and echidna are not completely identical and several share homology with the avian Z ... Suggests the Arrest of Recombination in the Largest Heteropycnotic Pair HC1. PLoS One 10 (12):e0143861. DOI:10.1371/journal. ... The list of organisms by chromosome count describes ploidy or numbers of chromosomes in the cells of various plants, animals, ... any differences between the sex chromosomes, and any other physical characteristics. The preparation and study of karyotypes is ...
  https://en.wikipedia.org/wiki/List_of_organisms_by_chromosome_count
*  Immunofluorescent staining reveals hypermethylation of microchromosomes in the central bearded dragon, Pogona vitticeps |...
This study is the first to study the distribution of epigenetic marks on non-avian reptile chromosomes. We observed an ... Hypermethylation of microchromosomes compared to macrochromosomes is a shared feature between P. vitticeps and avian species. ... we have analysed the distribution of epigenetic marks using immunofluorescence on metaphase chromosomes of the central bearded ... Comparatively little is known about the presence and distribution of epigenetic marks in non-model amniotes such as non-avian ...
  https://molecularcytogenetics.biomedcentral.com/articles/10.1186/s13039-015-0208-6
*  Molecular patterns of sex determination in the animal kingdom: a comparative study of the biology of reproduction |...
... sex is determined by the ratio of X chromosomes to autosomes and the sex switching gene, sxl. Another model organism whose sex ... This mechanism is also known as single-locus complementary sex determination (slCSD). On the other hand, for Dipterans and ... As further failures in recombination followed, with a constant nucleotide loss in the unstable chromosome (Y), homology between ... Ellegren H: Hens, cocks and avian sex determination. A quest for genes on Z or W?. Embo reports. 2001, 2: 192-196. 10.1093/embo ...
  https://rbej.biomedcentral.com/articles/10.1186/1477-7827-4-59
*  CSHLPress.com
... on the part of the Y chromosome that does not undergo recombination to significantly update and refine the Y chromosome ... Researchers find chemical tag that locks chromosomes together during meiosis 11/30/2016. A Harvard Medical School news release ... Platypus genome unravels mysteries of mammalian evolution. 05/07/2008. Genome Research is publishing several papers related to ... Electrophoresis of RNA, Avian Imaging featured in June's Cold Spring Harbor Protocols ...
  https://www.cshlpress.com/events.tpl?cart=1507894909411381392
*  CSHLPress.com
... on the part of the Y chromosome that does not undergo recombination to significantly update and refine the Y chromosome ... Electrophoresis of RNA, Avian Imaging featured in June's Cold Spring Harbor Protocols 06/01/2010. COLD SPRING HARBOR, N.Y. ( ... Researchers find chemical tag that locks chromosomes together during meiosis 11/30/2016. A Harvard Medical School news release ... Platypus genome unravels mysteries of mammalian evolution 05/07/2008. Genome Research is publishing several papers related to ...
  https://www.cshlpress.com/press.tpl?cart=15003170782421483
*  Chromosomal integration of an avian oncogenic herpesvirus reveals telomeric preferences and evidence for lymphoma clonality |...
Chromosome locations of MDV integrations in lymphomas: Telomeres of autosomes and sex chromosomes. ... Characterizing the chromosomes of the platypus (Ornithorhynchus anatinus). Chromosome Res. 2007, 15: 961-974. 10.1007/s10577- ... The telomeric array repeats were hypothesized to assist the HHV-6 integration mechanism through homologous recombination [9]. ... Meiotic instability of chicken ultra-long telomeres and mapping of a 2.8 megabase array to the W-sex chromosome. Chromosome Res ...
  https://herpesviridae.biomedcentral.com/articles/10.1186/2042-4280-1-5
*  Lack of sex chromosome specific meiotic silencing in platypus reveals origin of MSCI in therian mammals | BMC Biology | Full...
... feature a complex and highly differentiated XY sex chromosome system with homology to the avian sex chromosomes, and also lack ... Sex chromosomes, recombination, and chromatin conformation. Chromosoma. 1993;102(2):71-80.View ArticlePubMedGoogle Scholar. ... Platypus sex chromosomes coalesce into a dense mass during prophase I. We identified platypus sex chromosome elements within a ... Platypus sex chromosomes form a condensed body at pachytene. To assess sex chromosome distributions and chromatin compaction ...
  https://0-bmcbiol-biomedcentral-com.brum.beds.ac.uk/articles/10.1186/s12915-015-0215-4