5. In the famous example of the evolution of freshwater three-spined stickleback fish,the candidate gene Pitx1 does not express in the pelvic region, leading to the lack of development of pelvic spine. This is likely due to the mutation in which region of the Pitx1gene?
(A) The enhancer or promoter region
(B) The protein-coding region
(C) The region under balancing selection in the lake
阿摩線上測驗
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