Results 41 to 50 of about 6,581 (145)

Within‐Host Environmental Heterogeneity Is Associated With Phenotypic but Not Genomic Diversity in Wolbachia Endosymbionts

open access: yesEnvironmental Microbiology Reports, Volume 18, Issue 1, February 2026.
(A) Wolbachia's success in colonising new hosts depends on the tissue they originate from. (B) Genome resequencing revealed that differences in colonisation success were not due to genetic change but instead to phenotypic plasticity. (C) Six months after injection, Wolbachia's tissue origin no longer influenced their ability to maintain infection ...
Romain Pigeault   +12 more
wiley   +1 more source

Comparative Evaluation of Follicular Flushing Frequency and Scraping Time During Ovum Pick‐Up in Mares: Effects on Oocyte Recovery Rate and Technical Considerations

open access: yesReproduction in Domestic Animals, Volume 61, Issue 2, February 2026.
ABSTRACT Transvaginal ultrasound‐guided follicular aspiration or ovum pick‐up (OPU) has become the standard technique for oocyte collection in mares for intracytoplasmic sperm injection (ICSI). Although repeated follicular flushes and wall scraping are commonly used to improve oocyte recovery rate (ORR), the relative contribution of each remains ...
Adrián Márquez‐Moya   +4 more
wiley   +1 more source

Functional Integration of Different‐Sex Gonad Transplants Into the Adult Mouse Hypothalamic Pituitary Gonadal Axis

open access: yesAdvanced Biology, Volume 10, Issue 1, January 2026.
This study introduces and investigates different‐sex gonad transplants in a mouse model of gender‐affirming hormone therapy. Ovaries and testes implanted into gonadectomized adults exhibit gametogenesis and steroidogenesis independent of the sex of the host.
Daniel R. Pfau   +8 more
wiley   +1 more source

Novel Worker‐Like Behavior Observed in Gynes of the Social Parasite Tetramorium microgyna

open access: yesEcology and Evolution, Volume 16, Issue 1, January 2026.
Our article reports, to our knowledge, the first observations of inquiline gynes performing worker tasks for their host colony. We dissected these gynes to establish that they were all unmated. We hypothesize that nest excavation by social parasites represents an artifact of a non‐parasitic past.
François Brassard, Christina Kwapich
wiley   +1 more source

Interspecies somatic cell nuclear transfer is dependent on compatible mitochondrial DNA and reprogramming factors [PDF]

open access: yes, 2011
Interspecies somatic cell nuclear transfer (iSCNT) involves the transfer of a nucleus or cell from one species into the cytoplasm of an enucleated oocyte from another.
Jiang, Yan   +6 more
core   +2 more sources

Thirty Years of the Biology of Spermatozoa: The Rise and Future of an Evolutionary Paradigm

open access: yesEcology and Evolution, Volume 16, Issue 1, January 2026.
A sperm bundle taken from the seminal vescicles of the dung beetle, Onthophagus taurus. Image credit: Leigh W. Simmons. ABSTRACT In the early 1970s, Geoff Parker recognised that because females frequently mate with multiple males, competition for fertilizations will impose significant sexual selection on males and their ejaculates.
Leigh W. Simmons
wiley   +1 more source

Karyotyping and localization of genes on the chromosomes of the sea urchins, Strongylocentrotus drobachiensis and Strongylocentrotus purpuratus [PDF]

open access: yes, 2009
The purple sea urchin, Strongylocentrotus purpuratus , is an important model for probing gene interactions during animal development and is the only non-chordate deuterostome for which a complete genome sequence is available.
Eno, Celeste Chloe
core   +2 more sources

Exploring the Impact of In Ovo Injection of Flavonoid‐Based Aromatase Inhibitors on Gonadal Histology Differentiation in Ross 308 Broiler Chickens

open access: yesVeterinary Medicine and Science, Volume 12, Issue 1, January 2026.
This study aimed to evaluate the in ovo injection of nettle extract, mushroom extract and their mixture as natural anti‐aromatase on sex reversal, histological changes in ovaries and testes and carcass characteristics of Ross 308 broiler chickens. Sex differentiation in avian species A completely randomized block design used to allocate 500 fertilized ...
Ali Akbari‐Balajorshari   +3 more
wiley   +1 more source

Genome-wide analysis identifies 12 loci influencing human reproductive behavior. [PDF]

open access: yes, 2016
The genetic architecture of human reproductive behavior-age at first birth (AFB) and number of children ever born (NEB)-has a strong relationship with fitness, human development, infertility and risk of neuropsychiatric disorders.
A Kundaje   +339 more
core   +13 more sources

Macrophages in endocrine glands, with emphasis on pancreatic islets [PDF]

open access: yes, 2016
We review here the macrophages found in endocrine tissues, placing emphasis on those residing in the islets of Langerhans of the pancreas. The islets represent the endocrine organ where macrophages have been examined in great detail and where our own ...
Unanue, Emil R
core   +2 more sources

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