Mr. Jackson is a teacher of science in a middle school. His students like his classes because his classes are very interesting. They can learn a lot in his class. The students can make（制作）many things. His little son Val also likes making things. He makes lots of machines（机器）, such as a machine like a man. It can do the job that is dangerous（危险的）for people to do. He says, “I want to be a scientist.”
根据短文内容，选择正确答案。

现有某动物减数分裂过程中所产生的一个极体，染色体数为M个，核DNA分子数为N个，又已知M≠N，则该动物的一个初级卵母细胞中的染色体数和一个卵原细胞细胞核中的DNA分子数分别是（  ）