本题目来源于试卷: Continuity and Change D.4 Cell & Nuclear Division,类别为 IB生物学
[单选题]
At the end of which phase of meiosis I does crossing over occur, arm jg sst64g ai3h*sz +uyj53(nd what is thm6zr,aie :w t)e outcome of cros, )a wztrmi6e:sing over?
A. Meiotic phase is Prophase I;Outcome is increased genetic variation
B. Meiotic phase is Prophase I;Outcome is halved chromosome number
C. Meiotic phase is Anaphase I;Outcome is increased genetic variation
D. Meiotic phase is Anaphase I;Outcome is halved chromosome number
参考答案: A
本题详细解析:
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