Results 11 to 20 of about 86,282 (258)

Numerous transitions of sex chromosomes in Diptera.

PLoS Biology, 2015
Many species groups, including mammals and many insects, determine sex using heteromorphic sex chromosomes. Diptera flies, which include the model Drosophila melanogaster, generally have XY sex chromosomes and a conserved karyotype consisting of six ...
Beatriz Vicoso, Doris Bachtrog
doaj   +2 more sources

Meiotic pairing and segregation of achiasmate sex chromosomes in eutherian mammals: the role of SYCP3 protein. [PDF]

PLoS Genetics, 2007
In most eutherian mammals, sex chromosomes synapse and recombine during male meiosis in a small region called pseudoautosomal region. However in some species sex chromosomes do not synapse, and how these chromosomes manage to ensure their proper ...
Roberto de la Fuente, María Teresa Parra, Alberto Viera, Adela Calvente, Rocío Gómez, José Angel Suja, Julio S Rufas, Jesús Page   +7 more
doaj   +1 more source

Sex Chromosomes and Sex Determination in Dioecious Agricultural Plants

Agronomy, 2023
Unlike in animals, dioecy among flowering plants is a rare phenomenon. The vast majority of angiosperm species have a bisexual flower that combines male (androecium) and female (gynoecium) reproductive organs.
Olga V. Razumova, Oleg S. Alexandrov, Karina D. Bone, Gennady I. Karlov, Mikhail G. Divashuk   +4 more
doaj   +1 more source

Sex-limited chromosomes and non-reproductive traits

BMC Biology, 2022
Sex chromosomes are typically viewed as having originated from a pair of autosomes, and differentiated as the sex-limited chromosome (e.g. Y) has degenerated by losing most genes through cessation of recombination.
Aivars Cīrulis, Bengt Hansson, Jessica K. Abbott   +2 more
doaj   +1 more source

Remnant of Unrelated Amniote Sex Chromosomal Linkage Sharing on the Same Chromosome in House Gecko Lizards, Providing a Better Understanding of the Ancestral Super-Sex Chromosome

Cells, 2021
Comparative chromosome maps investigating sex chromosomal linkage groups in amniotes and microsatellite repeat motifs of a male house gecko lizard (Hemidactylus frenatus, HFR) and a flat-tailed house gecko lizard (H.
Worapong Singchat, Thitipong Panthum, Syed Farhan Ahmad, Sudarath Baicharoen, Narongrit Muangmai, Prateep Duengkae, Darren K. Griffin, Kornsorn Srikulnath   +7 more
doaj   +1 more source

Snake W Sex Chromosome: The Shadow of Ancestral Amniote Super-Sex Chromosome

Cells, 2020
Heteromorphic sex chromosomes, particularly the ZZ/ZW sex chromosome system of birds and some reptiles, undergo evolutionary dynamics distinct from those of autosomes. The W sex chromosome is a unique karyological member of this heteromorphic pair, which
Worapong Singchat, Syed Farhan Ahmad, Nararat Laopichienpong, Aorarat Suntronpong, Thitipong Panthum, Darren K. Griffin, Kornsorn Srikulnath   +6 more
doaj   +1 more source

A trans-species missense SNP in Amhr2 is associated with sex determination in the tiger pufferfish, Takifugu rubripes (fugu). [PDF]

PLoS Genetics, 2012
Heterogametic sex chromosomes have evolved independently in various lineages of vertebrates. Such sex chromosome pairs often contain nonrecombining regions, with one of the chromosomes harboring a master sex-determining (SD) gene. It is hypothesized that
Takashi Kamiya, Wataru Kai, Satoshi Tasumi, Ayumi Oka, Takayoshi Matsunaga, Naoki Mizuno, Masashi Fujita, Hiroaki Suetake, Shigenori Suzuki, Sho Hosoya, Sumanty Tohari, Sydney Brenner, Toshiaki Miyadai, Byrappa Venkatesh, Yuzuru Suzuki, Kiyoshi Kikuchi   +15 more
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Microsatellite distribution on sex chromosomes at different stages of heteromorphism and heterochromatinization in two lizard species (Squamata: Eublepharidae: Coleonyx elegans and Lacertidae: Eremias velox)

BMC Genetics, 2011
Background The accumulation of repetitive sequences such as microsatellites during the differentiation of sex chromosomes has not been studied in most squamate reptiles (lizards, amphisbaenians and snakes), a group which has a large diversity of sex ...
Kratochvíl Lukáš, Pokorná Martina, Kejnovský Eduard   +2 more
doaj   +1 more source

Sex Chromosomes and Sex Hormones: Dissecting the Forces That Differentiate Female and Male Hearts. [PDF]

Circulation
Brong A, Kontrogianni-Konstantopoulos A.
europepmc   +2 more sources

Chromosome mapping of repetitive sequences in Anostomidae species: implications for genomic and sex chromosome evolution

Molecular Cytogenetics, 2012
Background Members of the Anostomidae family provide an interesting model system for the study of the influence of repetitive elements on genome composition, mainly because they possess numerous heterochromatic segments and a peculiar system of female ...
da Silva Edson Lourenço, de Borba Rafael Splendore, Parise-Maltempi Patrícia Pasquali   +2 more
doaj   +1 more source