Ancient Genetics that Still Occur Today: Atavisms Explained

Did you know that traits in animal species can re-appear in a new generation hundreds of years later? These ancient reappearing genetics are called Atavisms, and they can help us understand amazing things about biology and evolution, like how limbs actually grow! Join us for a fascinating new episode of SciShow, hosted by Hank Green.

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Sources:
Dollo’s Law/Atavisms
https://pubmed.ncbi.nlm.nih.gov/7991619/
https://doi.org/10.1016/j.tree.2008.0...
https://doi.org/10.1002/ajmg.a.36234
Cetacean Hind Limbs
https://doi.org/10.1007/978-1-4899-01...
https://doi.org/10.1073/pnas.0602920103
https://doi.org/10.1046/j.1525-142X.2...
Limpet Shell Twists
https://pubmed.ncbi.nlm.nih.gov/16701...
https://doi.org/10.1098/rspb.2003.2517
Soil Mite Sex
https://doi.org/10.1073/pnas.0700034104
https://doi.org/10.1002/ece3.5303
https://doi.org/10.1016/0305-1978(92)...
Big Bone Worm Males
https://doi.org/10.1016/j.cub.2014.11...
https://doi.org/10.1016/j.crvi.2008.1...
https://doi.org/10.1038/s41467-017-01...
https://doi.org/10.1186/1741-7007-7-74

Images:
https://commons.wikimedia.org/wiki/Fi...
https://link.springer.com/article/10....
https://link.springer.com/article/10....
https://commons.wikimedia.org/wiki/Fi...
https://www.inaturalist.org/observati...
https://www.inaturalist.org/observati...
https://www.inaturalist.org/observati...
https://www.inaturalist.org/observati...
https://www.flickr.com/photos/jsjgeol...
https://www.flickr.com/photos/treegro...
https://eol.org/media/6248881
https://www.flickr.com/photos/treegro...
https://www.flickr.com/photos/treegro...
https://www.flickr.com/photos/scripps...
https://www.flickr.com/photos/scripps...
https://www.flickr.com/photos/scripps...