天一大联考·三晋名校联盟2023-2024学年高三年级阶段性测试(期中)生物答案，目前我们已经整理了天一大联考·三晋名校联盟2023-2024学年高三年级阶段性测试(期中)生物答案的各科答案和试卷，更多高中试卷答案请关注本网站或关注微信公众号:趣找答案 本次考试的各科试题和答案汇总在天一大联考·三晋名校联盟2023-2024学年高三年级阶段性测试(期中)各科试题及答案.

7.答案D命题透析本题以细胞决定为情境，考查细胞分化的相关知识，旨在考查考生获取信息的能力和综合运用能力，以及生命观念、科学思维的核心素养。思路点拨依据题干细胞决定的含义可知，细胞决定先于细胞分化发生，A项正确；细胞决定与基因选择性表达有关，B项正确；由题意可知，关闭基因Brm,细胞不能合成蛋白Brahma,干细胞不能分化为心脏细胞前体细胞而分化为脑细胞前体细胞，说明Brahma可激活心脏细胞所需的基因，关闭脑细胞所需的基因，C项正确；关闭基因Bm,细胞分化发生改变，进而证明细胞决定的存在，D项错误。

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