Cell division: Asynthetic fission
https://doi.org/10.1038/s41586-022-04641-0
A recent paper in Nature reported on a novel form of cell division called asynthetic fission. The skin cells of zebrafish are able to split twice; in other words, one skin cell can split into three new cells plus itself. Remarkably, asynthetic fission doesn’t replicate DNA. It simply splits whatever DNA is available into the two halves. The DNA is damaged during the process, but only seemed to occur during times of rapid growth. Once growth slowed down, the damaged cells were removed.
The researchers developed a technique to tag each individual skin cell and then record time-lapse imagery in order track splitting events.
Git: Resolving merge conflicts
When merging, sometimes I have files that I deleted without using git rm, I
think. To get rid of them, git add -u is a useful command I found here:
https://stackoverflow.com/questions/6004453/how-to-remove-multiple-deleted-files-in-git-repository
-u --updateUpdate the index just where it already has an entry matching
<pathspec>. This removes as well as modifies index entries to match the working tree, but adds no new files.If no
<pathspec>is given when-uoption is used, all tracked files in the entire working tree are updated (old versions of Git used to limit the update to the current directory and its subdirectories).
This webpage may also be useful when choosing which version of file to commit: