染色体干涉
参考答案：
指在二价染色体的一个区段的互换干扰或抑制另一个区段的互换。
—Could you tell me ____?
—It’s twenty minutes by underground.
A．how can I get to your school
B．how much it costs to get to your school
C．how far it is from your home to your school
D．how long does it take me to get to your school
表现在感知、记忆、思维等活动中的性格特征属于（）。
A.态度特征
B.理智特征
C.情绪特征
D.意志特征
