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 phasgk*w:z k f3s;re of meiosis0g *san) +io)pc my8fce1etu3 I does crossing over occur, and what is the outcome of crossing overto)pcinscf ) +e03m* 8 agyeu1?
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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