從貓的遺傳學上來說,決定毛色遺傳的基因是位於X染色體,而在Y染色體上並沒有任何毛色的基因。衆所周知雌貓的性染色體是XX,如果其中一條帶有嗜鉻黑色素、另一條帶有真黑色素的話,那這兩種色素就會在貓的身上參雜成為玳瑁色;[22] 假設產生白色的基因也發生作用的話,那麼貓的身上就會出現白色的補丁(或形成大面積白色的玳瑁雙色)。
從貓的遺傳學上來說,決定毛色遺傳的基因是位於X染色體,而在Y染色體上並沒有任何毛色的基因。衆所周知雌貓的性染色體是XX,如果其中一條帶有嗜鉻黑色素、另一條帶有真黑色素的話,那這兩種色素就會在貓的身上參雜成為玳瑁色;[22] 假設產生白色的基因也發生作用的話,那麼貓的身上就會出現白色的補丁(或形成大面積白色的玳瑁雙色)。
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