US Edition20-Year Study Finds Mammal Cloning Hits Genetic Dead End After 58 Generations
Researchers cloned over 1,200 mice from a single donor over 58 generations, revealing mutation accumulation causes clone death and sexual reproduction restores health, study shows.
- On Tuesday, University of Yamanashi researchers published a study in Nature Communications revealing a genetic limit to serial mouse cloning after a 20-year experiment producing more than 1,200 mice over 58 generations.
- Developmental biologist Teruhiko Wakayama and his team found that while the first 25 generations appeared healthy, deleterious genetic mutations gradually accumulated, eventually triggering fatal defects in later generations.
- Genetic analysis revealed chromosomal abnormalities, including X chromosome loss, occurred at rates three times higher than in natural mating, supporting Muller's ratchet theory that asexual lineages inevitably accumulate fatal mutations.
- Despite appearing physically normal at birth, the 58th generation of clones died within days due to accumulated mutations, confirming that mammals cannot sustain their species through cloning alone.
- The study concludes sexual reproduction is indispensable for long-term mammalian survival, as researchers now seek new methods to fundamentally improve nuclear transfer technology.
42 Articles
42 Articles
Researchers at Yamanashi University in Japan determined that mammals have an insurmountable biological limit to cloning.The study revealed that it is not possible to genetically replicate these animals infinitely due to an imminent risk of mutational collapse.For two decades, scientists chained clone clones from an original mouse.This process resulted in 1,200 individuals.However, generation 58 failed to survive.Teruhiko Wakayama, the lead autho…
The Exact Number of Times You Can Clone a Clone Before Things Go Horribly Wrong
According to a long-running study published in Nature Communications, scientists in Japan have found that you can’t just keep cloning clones of living things indefinitely and expect things to turn out okay in the end. Eventually, the chain of clones starts to collapse. For nearly 20 years, a research team led by Teruhiko Wakayama at the University of Yamanashi has been serially cloning mice, meaning cloning a mouse, then cloning its clone, and t…
A team of Japanese researchers has been cloning a single mouse for 20 years.
A 20-year experiment by Japanese scientists showed that at least mice cannot be cloned indefinitely, because by the 58th generation, accumulated genetic errors led to the extinction of the line. The experiment proved that mammalian species remain viable only if they reproduce naturally.
There is a biological limit to mammal cloning, according to Japanese researchers, which suggest a risk of mutational collapse.
After two decades of experimentation, Japanese researchers have shown for the first time that there is a biological limit to mammal cloning in a study published on Tuesday 24 March.
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