#DidYouKnow: #Parthenogenesis (#Virgin #Birth) is a natural form of asexual reproduction in which growth and development of embryos occur in a gamete (egg or sperm) without combining with another gamete (e.g., egg and sperm fusing).

Parthenogenesis occurs naturally in some plants, algae, invertebrate animal species.

https://knowledgezone.co.in/kbits/648061560def7e399fce0111

"While #VirginBirths occur naturally in many #animal species and have been induced in others — including mice — by manipulating cells, this #research marked the first time #scientists isolated specific #genes to make #parthenogenesis a lasting and inheritable trait in an organism not otherwise capable of this type of reproduction. Though the feat may seem like the stuff of #scienceFiction, take note: It is not the harbinger of virgin births in humans."

https://www.cnn.com/2023/08/03/world/virgin-birth-fruit-fly-first-scn/index.html

"The genetically induced parthenogenetic #Drosophila melanogaster eggs exhibit de novo centrosome formation, fusion of the meiotic products, and the onset of development to generate predominantly triploid offspring. Thus, we demonstrate a genetic basis for sporadic facultative #parthenogenesis in an animal."

"A genetic basis for facultative parthenogenesis in Drosophila": Current Biology
https://www.cell.com/current-biology/fulltext/S0960-9822(23)00913-2?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS0960982223009132%3Fshowall%3Dtrue

And the Current Biology paper

“…increased expression of the mitotic protein kinase polo and decreased expression of a desaturase, Desat2, caused facultative parthenogenesis in the non-parthenogenetic species that was enhanced by increased expression of Myc.”
#Science #Genetics #Parthenogenesis

https://www.cell.com/current-biology/fulltext/S0960-9822(23)00913-2?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS0960982223009132%3Fshowall%3Dtrue

Scientists discover secret of #virgin_birth, and switch on the ability in female.

#parthenogenesis #gene #drosophila

https://phys.org/news/2023-07-scientists-secret-virgin-birth-ability.html

Now published in Peer Community Journal, #evolutionarybiology section: "Facultative #parthenogenesis: a transient state in transitions between sex and obligate asexuality in #stickinsects?" https://doi.org/10.24072/pcjournal.283

Scientists Discover a Virgin Birth in a #Crocodile
The act of reptile reproduction suggests that dinosaurs and pterosaurs may have been capable of #parthenogenesis, too, much like the creatures in “Jurassic Park.”
https://archive.ph/jzpVC

And the specific paper.
#parthenogenesis #ReproBio #Crocodile

“the ability of sexually reproducing species to generate offspring without genetic contributions of males, termed facultative parthenogenesis (FP)”

“using whole-genome sequencing and bioinformatic analysis, we provide, to our knowledge, the first evidence of FP in a crocodilian, the American crocodile”

https://royalsocietypublishing.org/doi/10.1098/rsbl.2023.0129

Crocodile pulls of #parthenogenesis

https://www.rte.ie/news/world/2023/0607/1387907-crocodile/

Hold on, hold on - didn't we cover this in the respected scientific treatise, 'Jurassic Park?'

https://www.bbc.co.uk/news/science-environment-65834167

#Parthenogenesis #VirginBirth #YoureNeverAloneWithAClone

«The first case of #crocodile who made herself pregnant has been identified at zoo in #CostaRica, producing fetus that was 99.9% genetically identical to herself.

The phenomenon o so-called
" #VirginBirth " has been found in species o birds, fish & other reptiles, but never before in crocodiles.

The scientists say the trait might be inherited from an evolutionary ancestor, so dinosaurs might also have been capable of self-reproduction.»

#parthenogenesis #LizardGod

https://www.bbc.com/news/science-environment-65834167

"This wonderful and meticulously performed study produces strong and complementary evidence for facultative parthenogenesis in T. douglasi populations… This might be an example of an ongoing transition from sexual to asexual reproduction, which indicates that obligate parthenogenesis may derive via transient facultative parthenogenesis" https://evolbiol.peercommunityin.org/PCIEvolBiol/articles/rec?id=551 #Evolution #EvolutionaryBiology #parthenogenesis @dee_unil @PeerCommunityIn

#parthenogenesis https://www.youtube.com/watch?v=hdkcXqQPMdM

"...researchers were stunned to discover Bubbles was the sole parent of the baby sharks, having reproduced via parthenogenesis, or "virgin birth," where a female will fertilize eggs with her own genetic material."
#VirginBirth #Parthenogenesis
https://www.upi.com/Odd_News/2022/12/20/zebra-shark-parthenogenesis-hatches-pups-no-father/5011671569845/

https://pursuit.unimelb.edu.au/articles/the-australian-grasshopper-that-s-given-up-sex #parthenogenesis #allfemalespecies #costofsex

#germline #meiosis #parthenogenesis

Our findings provide the first evidence of #FacultativeParthenogenesis in #KingCobra and accumulating evidence of #parthenogenesis across #SquamateReptiles suggests that the significance of facultative parthenogenesis in #vertebrate #evolution may be underappreciated. 5/5

Using patterns of #heterozygosity, we find strong support for a model of #TerminalFusionAutomixis as the mechanism underlying #parthenogenesis, which results in low, but appreciable, amounts of retained #genetic #diversity in #offspring. 4/5

This result indicates that #KingCobra, among other #SquamateReptiles evaluated in recent years, exhibits #FacultativeParthenogenesis. However, we also go further and use our data to shed light on the genetic mechanism of #parthenogenesis. 3/5

Given I am encountering many new people here on #Mastodon, I'm planning 2 copy over threads from bird.site that helps #introduce folks to my (recent) work. Here is the first one based on an article I #published in 2021.

I am very happy to report the #publication of my paper on #parthenogenesis in #cobras with @freekvonk@twitter.com, S. Smalbrugge, @nickcasewell@twitter.com, @wolfgangwuster@twitter.com, T. Castoe, G. Schuett, &
@Warren_Booth@twitter.com is now available from @SciReports@twitter.com: https://doi.org/10.1038/s41598-021-86373-1. Thanks to all co-authors! 1/5