Calico cat and tortoiseshell cat (IMAGE)

Kyushu University

Calico cat and tortoiseshell cat

Caption

Calico cats (left) and tortoiseshell cats (right) are the classic example of X chromosome inactivation, where either an orange color or a black color variant of a gene on the X chromosome is active in skin cells, resulting in orange and black patches.

Credit

Hiroyuki Sasaki/Kyushu University

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