从题中所给的A、B、C、D四个选项中选出与句中划线部分意义最接近的解释。
Jack called his mother at 7:30 yesterday, but she didn't pick up at that time.
如图是正在进行分裂的某二倍体动物细胞示意图，图中的英文字母表示染色体上的基因。下列说法不正确的是
