this post was submitted on 18 May 2025
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cats

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[–] Curious_Canid@lemmy.ca 56 points 2 weeks ago

International law requires them to be orange as a safety warning.

[–] Zachariah@lemmy.world 44 points 2 weeks ago (1 children)

Lead author Chris Kaelin explained that orange cats produce more of an orange/red pigment called pheomelanin than they do a black/brown pigment called eumelanin, which isn’t too dissimilar from redheaded humans.

While human gingers owe their color to changes in the MC1R gene, the orange cat mutation is located in one gene called Arhgap36. The scientists say that the protein produced by this gene disrupts the biological pathway that determines a cat’s coat color, effectively shutting down eumelanin production and letting orange pigment take over.

As for why most orange cats are dudes, that has everything to do with a cat’s X chromosome. Males only get one, so if that X carries the mutation, it’s a ginger. Females, having two Xs, need both to be mutated to go full orange.

[–] Rhaedas@fedia.io 26 points 1 week ago (1 children)

effectively shutting down eumelanin production

And brain cell production.

[–] sapetoku@sh.itjust.works 8 points 1 week ago

Well, they got the two brain cells fighting for third place

[–] al_Kaholic@lemmynsfw.com 21 points 2 weeks ago

Lasagna DNA.

[–] Diplomjodler3@lemmy.world 17 points 2 weeks ago

A cat needs at least two brain cells to develop any other colour.

[–] UrPartnerInCrime@sh.itjust.works 7 points 1 week ago (1 children)

isn't too dissimilar to red heads

So orange cats are actually black?

[–] Noodle07@lemmy.world 6 points 1 week ago (1 children)

They're just very bad at it

Leave them alone they're doing their best at melanin