21-三体综合征最常见的类型为A、核型46,XX(XY),-14,+t(14q21q) B、核型46,XX(XY)/47,XX(XY),+21 C、核...

作者: tihaiku 人气: - 评论: 0
问题 21-三体综合征最常见的类型为
选项 A、核型46,XX(XY),-14,+t(14q21q) B、核型46,XX(XY)/47,XX(XY),+21 C、核型47,XX(XY),+21 D、核型46,XX(XY),-22,+t(21q22q) E、核型46,XX(XY),-21,+t(21q21q)
答案 C
解析 标准型患者体细胞染色体为47条,有一条额外的21号染色体,核型为47,XX(XY),+21,此型最常见,占95%。

相关内容:三体,综合征,类型,核型,14q21q

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