题目

My friend Jane is a sports fan(爱好者). She has a great sports collection. She has three soccer balls, five baseballs, six volleyballs and two basketballs. They are all under her bed. Jane plays basketball very well. She likes Kobe. She thinks he is the best(最好的)basketball player in America. Jane plays baseball very well, too. Now she is in her school baseball club.【1】Jane has _______ volleyballs.A. six B. five C. three D. ten【2】Kobe is a _______ .A. student B. basketball player C. teacher D. baseball player【3】Jane plays _______ very well.A. soccer and basketball B. volley29．在荧光显微镜下观察被标记的某动物的睾丸细胞，等位基因A、a被分别标记为红、黄色，等位基因B、b被分别标记为蓝、绿色。①③细胞都处于染色体向两极移动的时期。不考虑基因突变和交叉互换，下列有关推测合理的是（      ） A．①时期的细胞中向每一极移动都有红、黄、蓝、绿色荧光点，各2个 B．③时期的细胞中向每一极移动都有红、黄、蓝、绿色荧光点，各1个 C．②时期的初级精母细胞中都有红、黄、蓝、绿色荧光点，各2个 D．图中精细胞产生的原因是减数第一次分裂或减数第二次分裂过程异常