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daniellionyang daniellionyang
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8 years ago
My biology textbook states that X inactivation happens randomly. However, X-linked dominant and X-linked recessive traits only follow either dominant or recessive patterns. What's with this disconnect? Thanks!
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Educator
8 years ago
Good question. According to a Wikipedia article:

Some scholars have suggested discontinuing the terms dominant and recessive when referring to X-linked inheritance due to the multiple mechanisms that can result in the expression of X-linked traits in females, which include cell autonomous expression, skewed X-inactivation, clonal expansion, and somatic mosaicism.
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