Jon Perry - Genetics & Evolution Stated Casually | How do genes control cell shape? @StatedCasually | Uploaded 2 years ago | Updated 1 day ago
Here I respond to a question posed by Hank Green about cell shape and morphogenesis.

Here is Wim's video: youtu.be/jFLUEBGTac8
Here is Hanks video: youtu.be/qV0udTvYK6M
Here are several other videos of various desmids dividing (some in the genus Micrasterias). Several of these were briefly shown in my video:
youtu.be/0P7RQV51XvU
youtu.be/llO0ZZlSGc8
youtu.be/XwpFhh3Lqhs
youtu.be/BC1m26CtXY0
youtu.be/Uc9ppqqCMmI

The link below is extra cool, it shows a species that separates earlier. As a result, you have less branching. The compressed areas (areas of less growth) seem to be set before the split though they are barely visible at the time:
youtu.be/gzh5j3NJ5-Q

Here is the research modeling the formation of these cells: ncbi.nlm.nih.gov/pmc/articles/PMC1692519/pdf/UQRN97D3DC9NNPKC_354_417.pdf

Here you can read about evolutionary spandrels and why they are called spandrels: en.wikipedia.org/wiki/Spandrel_(biology)

00:00 Introduction: The Spandrel hypothesis
01:34 My new obsession with Morphogenesis
02:16 Cell division in Micrasterias
05:07 How do grooves and spikes in the cell wall form?
10:04 Research modeling phenotype formation in various Desmids