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 ;fmv-ly jwr d(4-fq2zphase of meiosis I does crossi:kiz 6cyh;lk )/r2tving over occur, and what is the o;ik z6i/cl)y:r 2 tvkhutcome of crossing 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:
| 
