Mastodawn

Beneficial Mutations Are More Common, but Changing Environments Limit Their Impact

📰 Original title: Scientists say evolution may work differently than we thought

🤖 IA: It's clickbait ⚠️
👥 Users: It's clickbait ⚠️

View full AI summary https://en.killbait.com/beneficial-mutations-are-more-common-but-changing-environments-limit-their-impact.html?utm_source=mastodon_world&utm_medium=social&utm_campaign=killbait.mastodon_world

#science #evolution #mutations #adaptation

KillBait 6d ago

Beneficial Mutations Are More Common, but Changing Environments Limit Their Impact

📰 Original title: Scientists say evolution may work differently than we thought

🤖 IA: It's clickbait ⚠️
👥 Users: It's clickbait ⚠️

View full AI summary https://en.killbait.com/beneficial-mutations-are-more-common-but-changing-environments-limit-their-impact.html?utm_source=mastodon_social&utm_medium=social&utm_campaign=killbait.mastodon_social

#science #evolution #mutations #adaptation

Beneficial Mutations Are More Common, but Changing Environments Limit Their Impact

A new study from the University of Michigan challenges a long-standing assumption in evolutionary biology: that most genetic changes are neutral. Led by evolutionary biologist Jianzhi Zhang, the research found that beneficial mutations occur more often than previously believed, particularly in organisms like yeast and E. coli. Using deep mutational scanning, the team observed that over 1% of amino acid-changing mutations could improve fitness, a much higher rate than traditional models suggested. However, these advantageous mutations rarely become permanent because environmental conditions frequently change, altering the mutations' effects. The study proposes a framework called Adaptive Tracking with Antagonistic Pleiotropy, in which populations constantly adapt to shifting environments, and mutations often carry tradeoffs. Experiments with yeast over 800 generations in stable versus changing environments demonstrated that beneficial mutations in variable conditions often fail to fix because the environment shifts before they can spread through the population. The findings suggest that perfect adaptation is rarely achieved, as populations are perpetually responding to dynamic conditions. While the research focused on single-celled organisms, it raises implications for humans and other species, highlighting that evolution is less about reaching optimal adaptation and more about continuously tracking a changing environment.

KillBait

TKSST • seethis.tv 🌈🪐✨May 26

🧬🐟 The #Amazon #molly, an all-female #fish from #Texas and #Mexico rivers, has cloned itself for over 100,000 years – long past the predicted extinction deadline.

A 2026 #Nature #study by researchers at University of #Missouri and LMU #Munich shows the fish uses “gene conversion,” a #DNA repair trick, to erase bad #mutations and spread good ones without #sex.

👉 https://www.sciencealert.com/scientists-finally-know-how-an-all-female-fish-keeps-cloning-itself

#genetics #evolution #cloning #parthenogenesis #genome #geneconversion #reproduction #biology #science

Scientists Finally Know How an All-Female Fish Keeps Cloning Itself

It may sound too bizarre to be true, but the Amazon molly (Poecilia formosa), a fish that inhabits rivers, lakes, and swamps in Mexico and Texas, exists over much of its range in populations that are 100% female.

ScienceAlert

Benjamin Carr, Ph.D. 👨🏻‍💻🧬May 18

New #mutations help the #H5N1 #birdflu #virus infect cows but not people
The mutations target a specific sugar on the surface of cows’ cells
Specifically, two mutations commonly found in H5N1 #viruses infecting dairy cattle now allow the bird flu viruses to grip the sugar N-glycolylneuraminic acid, or NeuGc. Grasping this cattle sugar made it easier for H5N1 bird #flu viruses to infect and grow in mammary tissue from cows, the researchers found.
https://www.sciencenews.org/article/mutations-h5n1-bird-flu-adapt-cows
https://archive.ph/HP10U

New mutations help the H5N1 bird flu virus infect cows but not people

The findings show how the H5N1 bird flu virus is evolving in livestock and what that may mean for human health.

Science News

Kayleigh Beard May 14

Already a month went by since my album release show! 💿 Loved singing "Fairytale" with Athena and Lana and Welmoed 😍

Listen to the full song here: https://kayleighbeard.bandcamp.com/track/fairytale

#albumrelease #newalbum #releaseparty #releaseshow #artpop #indiemusic #altpop #artist #liveshow #livemusic #mutations #vinyl #record #buyvinyls #records #nowplaying #music #release #bandcamp #musician #celtic #celticmusic #choir #female #singer #feminism #fairytale #folk #folkmusic #acapella

Kayleigh May 14

Already a month went by since my album release show! 💿 Loved singing "Fairytale" with Athena and Lana and Welmoed 😍

Listen to the full song here: https://kayleighbeard.bandcamp.com/track/fairytale

#albumrelease #newalbum #releaseparty #releaseshow #artpop #indiemusic #altpop #artist #liveshow #livemusic #mutations #vinyl #record #buyvinyls #records #nowplaying #music #release #bandcamp #musician #celtic #celticmusic #choir #female #singer #feminism #fairytale

Kayleigh Apr 25

A nice weekend activity ✍️ It means so much to me when people order my brand new album Mutations on Eco Vinyl 🌱

Get yours here: https://kayleighbeard.bandcamp.com/album/mutations

#ecovinyl #vinyl #newrecord #recordoftheday #electronicpop
#vinyl #albumrelease #electropop #newalbum #electronicmusic #synthesizer #electropop #artpop #indiemusic #altpop #onewomanshow #artist #mutations #vinyl #ecovinyl #eco #recycled #record #records #nowplaying #music #release #bandcamp #musician #coloredvinyl #sign #ecofriendly #music

Kayleigh Beard Apr 25

A nice weekend activity ✍️ It means so much to me when people order my brand new album Mutations on Eco Vinyl 🌱

Get yours here: https://kayleighbeard.bandcamp.com/album/mutations

#ecovinyl #vinyl #newrecord #recordoftheday #electronicpop
#vinyl #albumrelease #electropop #newalbum #electronicmusic #synthesizer #electropop #artpop #indiemusic #altpop #onewomanshow #artist #mutations #vinyl #ecovinyl #eco #recycled #record #records #nowplaying #music #release #bandcamp #musician #coloredvinyl #sign #ecofriendly #music

Soh Kam Yung Apr 23

"[M]utations can mean nothing, but they can also mean everything. While many mutations are inert, others cause harm. Still others bring hope, and could correct some of the body’s problems, science writer Roxanne Khamsi explains in Beyond Inheritance. The book draws on the latest research across multiple fields of science to show that mutations are with us throughout our lives, shaping our health and our lifespans."

https://www.sciencenews.org/article/beyond-inheritance-book-khamsi-mutation

#Books #Reviews #Genetics #Mutations #Biology