Only 57 generations of cloned mice were produced, and then each one dies immediately after being born. Photo: James Wainscoat / Unsplash Read the summary What happens when an animal is cloned over and over again – generation after generation, without “fresh” genetic material? Japanese researchers decided to play out this question on mice, starting with a single individual. At first, everything seemed to be working out even better than anyone could have expected. Clones were born, grew up and lived like completely normal animals. But somewhere behind the invisible line, the system began to slowly break down. Genetic errors accumulated until at some point there was no way back. Will this discovery set limits on future hopes of cloning species or even pets? Researchers pushed the boundaries of mammal cloning until the whole map was redrawn. Topics: #what #cloned #mice Post navigation «I remember the evenings when we met at the corner of the house and talked about music!» Fans and friends remember Gameboy Tetrist The long-awaited amendment to the law gives hope to people with rare diseases