Why Are Mules Sterile?

Horse plus donkey — it seems like an unlikely combination. I mean, they're different species! And yet, when they get together, they can produce a mule or the lesser-known hinny. Either way, those offspring usually can't become parents themselves.

Hosted by: Rose Bear Don't Walk

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Sources:
https://www.mulemuseum.org/history-of-the-mule.html
https://www.horsetalk.co.nz/2016/10/28/mule-hinny-new-dna-technique/
https://genetics.thetech.org/ask/ask225
https://www.genome.gov/genetics-glossary/Chromosome
https://www.labroots.com/trending/videos/10528/why-mules-can-t-breed-baby-mules
https://www.yourgenome.org/facts/what-is-meiosis
https://link.springer.com/article/10.1007/BF00577041
https://medlineplus.gov/genetics/understanding/mutationsanddisorders/chromosomalconditions/
https://www.denverpost.com/2013/08/16/colorado-miracle-mule-foal-lived-short-life-but-was-well-loved/
https://www.denverpost.com/2007/07/25/mules-foal-fools-genetics-with-impossible-birth/

Images:
https://www.istockphoto.com/photo/donkey-and-horse-close-up-gm853891566-140313691
https://www.istockphoto.com/photo/the-chase-is-on-gm160104429-1179281
https://www.istockphoto.com/photo/horse-and-mules-in-cattle-pastures-gm1203587585-345984192
https://commons.wikimedia.org/wiki/File:Juancito.jpg
https://commons.wikimedia.org/wiki/File:Old_hinny_in_Oklahoma.jpg
https://commons.wikimedia.org/wiki/File:Mules_leisurely_enjoying_the_sun_and_the_snow.jpg
https://www.istockphoto.com/photo/im-all-ears-gm471212787-11198324
https://www.istockphoto.com/vector/meiosis-cell-division-gm1264913178-370595042
https://commons.wikimedia.org/wiki/File:Meiosis_Overview_new.svg
https://www.istockphoto.com/photo/cell-division-process-gm1283534321-380931278
https://www.istockphoto.com/photo/north-rim-grand-canyon-family-on-mules-gm492891846-76580503

Видео Why Are Mules Sterile? канала SciShow