下图表示一个细胞进行细胞分裂过程中，细胞核内染色体数目及染色体上的DNA数目的变化，则下列叙述错误的是 （ ） 
| A．上图表示有丝分裂和减数分裂的全过程 |
| B．图中两曲线重叠的各段所在时期，每条染色体都不含染色单体 |
| C．人体内CE段、IJ段和KL段细胞中染色体形态均为23种 |
| D．在BC段和HI段都可能发生基因突变，且突变基因都可能传给后代 |
相关试题
Which of the following sign will you probably see in a reading room of a library?
| A． |
|
B． |
|
C． |
|
D． |
|
— Happy birthday to you, Mary.
— ＿＿＿＿＿
| A． | Have a nice day. |
B． | See you. |
C． | The same to you. |
D． | Thank you. |
—Kevin, what are you doing? Don’t you remember that the doctor warns you not to eat any candy?
—I’m so sorry! I totally forgot about that. I’m so used to eating candy every Halloween that I didn’t remember this year I wasn’t supposed to. ＿＿＿＿＿
| A． | Practice makes perfect. |
B． | When in Rome, do as the Romans do. |
| C． | Old habits die hard. |
D． | Time is money. |
We＿＿＿＿＿a meeting. Come and join in.
| A． | were having |
B． | are having |
C． | had |
D． | have been |
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