Nude mouse

Rarity: Common

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Notion

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Science and technology

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What Wikipedia says

A nude mouse is a laboratory mouse from a strain with a genetic mutation that causes a deteriorated or absent thymus, resulting in an inhibited immune system due to a greatly reduced number of T cells. The phenotype (main outward appearance) of the mouse is a lack of body hair, which gives it the "nude" nickname.

Excerpt from the Wikipedia article “Nude mouse”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Kuebi = Armin Kübelbeck, CC BY-SA 3.0, via Wikimedia Commons.