Results 121 to 130 of about 49,023 (222)
Escaping Constraints to Innovate: Maternal Neofunctionalization in a HoxB4 Duplicate
Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, Volume 346, Issue 2, Page 141-151, March 2026.Whole‐genome duplication in Xenopus laevis generated duplicated Hox genes that are largely constrained in sequence and developmental expression. However, HoxB4L uniquely acquired maternal expression through cis‐regulatory and protein structural divergence, illustrating how gene duplication enables transcription factors to escape pleiotropic constraints
Júlia de Lima Carvalho +2 more
wiley +1 more source
Gonadal Development in Larvae of the Paedomorphic Ambystoma mexicanum (Amphibia: Urodela)
Journal of Morphology, Volume 287, Issue 3, March 2026.This research analyzes the gonads of Ambystoma mexicanum larvae of both sexes, revealing significant changes such as the onset of vitellogenesis in females at 9 months of age and oocytes with signs of maturity at 12 months. In males, gonadal maturity occurs earlier, with a notable cephalocaudal and lateromedial testicular regionalization, and ...
Jessica Lucía Sánchez‐Ortiz +2 more
wiley +1 more source
Bottleneck and selection in the germline and maternal age influence transmission of mitochondrial DNA in human pedigrees. [PDF]
, 2019 Heteroplasmy-the presence of multiple mitochondrial DNA (mtDNA) haplotypes in an individual-can lead to numerous mitochondrial diseases. The presentation of such diseases depends on the frequency of the heteroplasmic variant in tissues, which, in turn ...
Anthony, Kate +8 more
core
Pest Management Science, Volume 82, Issue 3, Page 2694-2707, March 2026.Varroa destructor mites exposed to dsRNA specific in sequence to a V. destructor calmodulin gene significantly effected gene expression of adult female mites sampled 5 days after entering a honey bee brood cell to reproduce. Significantly down‐regulated genes included Calmodulin and were associated with calcium ion binding and embryo developmental ...
Zoe E Smeele +10 more
wiley +1 more source
Embryonic and post-embryonic utilization and subcellular localization of the nuclear receptor SpSHR2 in the sea urchin [PDF]
, 1998 SpSHR2 (Strongylocentrotus purpuratus steroid hormone receptor 2) is a nuclear receptor, encoded by a maternal RNA in the sea urchin embryo. These maternal SpSHR2 transcripts, which are present in all cells, persist until the blastula stage and then are ...
Flytzanis, Constantin N. +2 more
core
Cell Proliferation, Volume 59, Issue 3, March 2026.Maternal TCF12 ensures the competence of fertilisation by controlling the expression of Astl and the proper location of cortical granules. Furthermore, maternal TCF12 maintains the phosphatase activity of PP2A by regulating the expression of Arpp19. Oocyte‐specific deletion of Tcf12 leads to fertilisation defects as well as ZGA failure at the 2‐cell ...
Lan‐Rui Cao +7 more
wiley +1 more source
Gonadulin and Insulin‐Like Growth Factor Involved in Rhipicephalus microplus Reproduction
Entomologia Experimentalis et Applicata, Volume 174, Issue 3, Page 285-295, March 2026.Insulin‐like growth factor (IGF2) in ovaries of Rhipicephalus microplus partially engorged females. Ovaries from females at different feeding stages were used to detect IGF2. ABSTRACT Gonadulin and insulin‐like growth factor (IGF) are neuropeptides synthesized by the central nervous system (CNS) of arthropods.
Jéssica Waldman +8 more
wiley +1 more source
Transcriptomic analysis of the spatiotemporal axis of oogenesis and fertilization in C. elegans
Frontiers in Cell and Developmental BiologyCaenorhabditis elegans hermaphrodite presents a unique model to study the formation of oocytes. However, the size of the model animal and difficulties in retrieval of specific stages of the germline have obviated closer systematic studies of this process
Yangqi Su +3 more
doaj +1 more source
Marine Ecology, Volume 47, Issue 2, March/April 2026.ABSTRACT Sipunculans are unsegmented marine annelids distributed from intertidal to deep sediments, playing important roles in nutrient cycling and ecosystem health. The Sipunculus nudus species complex is exploited as food and bait in several regions, yet reproductive data at the population level remain scarce, especially for Atlantic populations ...
Erika Catugy +4 more
wiley +1 more source