问题
单项选择题
21-三体综合征嵌合型核型
A．47,XY,＋21
B．46,XY(XX)/47,XY(XX)，＋2l
C．46,XY(XX),-14,＋t(14q21q)
D．46,XY(XX),-21,＋t(21q21q)
E．46,XY,＋21
答案
参考答案：B
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21-三体综合征嵌合型核型
A．47,XY,＋21
B．46,XY(XX)/47,XY(XX)，＋2l
C．46,XY(XX),-14,＋t(14q21q)
D．46,XY(XX),-21,＋t(21q21q)
E．46,XY,＋21
参考答案：B
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