Results 41 to 50 of about 1,345 (170)

The evolution of imprinting: chromosomal mapping of orthologues of mammalian imprinted domains in monotreme and marsupial mammals

BMC Evolutionary Biology, 2007
Background The evolution of genomic imprinting, the parental-origin specific expression of genes, is the subject of much debate. There are several theories to account for how the mechanism evolved including the hypothesis that it was driven by the ...
Dunham Ian, Graves Jennifer, Hore Timothy, Mungall Andrew J, Clarke Oliver, Rens Willem, Edwards Carol A, Ferguson-Smith Anne C, Ferguson-Smith Malcolm A   +8 more
doaj   +1 more source

Extreme telomere length dimorphism in the Tasmanian devil and related marsupials suggests parental control of telomere length. [PDF]

PLoS ONE, 2012
Telomeres, specialised structures that protect chromosome ends, play a critical role in preserving chromosome integrity. Telomere dynamics in the Tasmanian devil (Sarcophilus harrisii) are of particular interest in light of the emergence of devil facial ...
Hannah S Bender, Elizabeth P Murchison, Hilda A Pickett, Janine E Deakin, Margaret A Strong, Carly Conlan, Daniel A McMillan, Axel A Neumann, Carol W Greider, Gregory J Hannon, Roger R Reddel, Jennifer A Marshall Graves   +11 more
doaj   +1 more source

The “costly son” hypothesis: Sons exacerbate obstetrical dilemmas in humans and other mammals

The Anatomical Record, EarlyView.
Abstract Human childbirth has often been considered uniquely difficult among mammals, yet recent evidence suggests that obstructed labor and fetopelvic disproportion are widespread across placental mammals. Here, we propose the “costly son” hypothesis: because male offspring are typically larger at birth, they impose greater obstetric risk on mothers ...
Nicole D. S. Grunstra, Jonathan C. K. Wells   +1 more
wiley   +1 more source

Understanding the Type 2 Immunity: An Evolving View Beyond Allergic Diseases

Allergy, EarlyView.
ABSTRACT Type 2 (T2) immunity is classically associated with defense against helminths and environmental threats, from a physiological perspective, and with allergies and eosinophilic inflammatory diseases, in a pathological sense. However, growing evidence reveals that T2 pathways also support other essential homeostatic functions, including tissue ...
Rodrigo Jiménez‐Saiz, Salvador Iborra, Carlos Blanco, Ruperto González‐Pérez, Emilio Nuñez‐Borque, Can Zeyneloglu, Huseyn Babayev, Ozlem Göksel, Tuncay Göksel, Musa Khaitov, Dmitry Kudlay, Yadong Gao, Mustafa Sevim, Marie‐Charlotte Brüggen, Oral Alpan, Ming Wang, Luo Zhang, María J. Torres, Mohamed Shamji, Mübeccel Akdis, Kari C. Nadeau, Ismail Ogulur, Cezmi A. Akdis   +22 more
wiley   +1 more source

Description of the female, nymph and larva and mitochondrial genome, and redescription of the male of Ixodes barkeri Barker, 2019 (Acari: Ixodidae), from the short-beaked echidna, Tachyglossus aculeatus, with a consideration of the most suitable subgenus for this tick

Parasites & Vectors, 2022
Background Ixodes barkeri, a tick with a distinctive ventrolateral horn-like projection on palpal segment 1, was described in 2019 from two male ticks from the Wet Tropics of Far North Queensland, Australia.
Dayana Barker, Samuel Kelava, Renfu Shao, Owen D. Seeman, Malcolm K. Jones, Ryo Nakao, Stephen C. Barker, Dmitry A. Apanaskevich   +7 more
doaj   +1 more source

The MacBrain Resource Center (MBRC) rhesus macaque postnatal brain histology datasets: Enabling new discoveries through NHP tissue and digital data Repositories

Journal of Anatomy, EarlyView.
The MacBrain Resource Center (MBRC) postnatal rhesus macaque brain histology datasets are organized into Collections that promote cost‐effective de novo research. This article provides examples from Collections 5, 6, and 7 and describes the histo‐ and immunohistochemical (IHC) processing of materials for Collection 6.
Valeria Mendoza‐Silva, Lucy Greene, Emma Burke, Cristina Canales, Julia Chocarro, Jose L. Lanciego, Khuleshwari Kurrey, Phil Barello, Aya Nusir, Nadine Kabbani, Kathleen S. Rockland, Dibyadeep Datta, Jon I. Arellano, Amy F. T. Arnsten, Yury M. Morozov, Bashir Ahmed, Zoltán Molnár, Caroline J. Zeiss, Pasko Rakic, Alvaro Duque   +19 more
wiley   +1 more source

Evolution and survival on eutherian sex chromosomes. [PDF]

PLoS Genetics, 2009
Since the two eutherian sex chromosomes diverged from an ancestral autosomal pair, the X has remained relatively gene-rich, while the Y has lost most of its genes through the accumulation of deleterious mutations in nonrecombining regions.
Melissa A Wilson, Kateryna D Makova
doaj   +1 more source

Anatomical description of the jaw muscles and theoretical bite force assessment in South American opossums using manual and digital dissection methods

Journal of Anatomy, EarlyView.
Manual and virtual dissections were employed to examine the masticatory muscle architecture and bite force of three South American marsupials. The organisation of the muscles differed between species, with predicted bite forces exceeding previous estimates.
Alice Melekian, Vincent Decuypere, Anthony Herrel, François Clarac, Sandrine Ladevèze   +4 more
wiley   +1 more source

Modeling Dragons: Using linked mechanistic physiological and microclimate models to explore environmental, physiological, and morphological constraints on the early evolution of dinosaurs.

PLoS ONE, 2020
We employed the widely-tested biophysiological modeling software, Niche Mapper™ to investigate the metabolic function of the Late Triassic dinosaurs Plateosaurus and Coelophysis during global greenhouse conditions.
David M Lovelace, Scott A Hartman, Paul D Mathewson, Benjamin J Linzmeier, Warren P Porter   +4 more
doaj   +1 more source

EchidnaCSI – Improving monitoring of a cryptic species at continental scale using Citizen Science

Global Ecology and Conservation, 2021
Short-beaked echidna (Tachyglossus aculeatus) are a cryptic and iconic monotreme found throughout the continent of Australia. Despite observational records spanning many years aggregated in national and state biodiversity databases, the spatial and ...
Alan Stenhouse, Tahlia Perry, Frank Grützner, Megan Lewis, Lian Pin Koh   +4 more
doaj   +1 more source