【单选题】【消耗次数:1】
遗传物质存在于哪一种结构中( )。
核仁及染色质
核仁及核液
核膜及核液
核染色质或染色体
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相关题目
【单选题】 遗传物质存在于哪一种结构中( )。
①  核仁及染色质
②  核仁及核液
③  核膜及核液
④  核染色质或染色体
【单选题】 核圆或椭圆形,染色质呈块状,核仁消失,浆嗜多色性,红蓝相向,符合哪种细胞特点
①  原红
②  早幼红
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【判断题】 染色体是遗传物质的基础
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【单选题】 人体正常染色体数目为( )。
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②  22对常染色体,一对性染色体
③  22对常染色体,一对Y染色体
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【单选题】 人体正常染色体数目为( )。
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②  22对常染色体,一对性染色体
③  22对常染色体,一对Y染色体
④  23对常染色体,一对X染色体
【单选题】 以下属于小儿染色体病中的一种是
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④  21-三体综合征
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【判断题】 细菌的核没有核膜和核仁。()
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【单选题】 人的染色体共有( )对。
①  21
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【单选题】 人体共有多少对常染色体?
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