The chromosome counter

A cell has 2n chromosomes in G1. You will write a function that gives the chromosomes, the DNA molecules and the DNA content at each stage of the cycle.

The idea. S phase doubles the DNA molecules but not the chromosomes. At anaphase the chromatids are counted as chromosomes. The DNA content in C is the DNA molecules divided by n, which is half of 2n.

Your tasks.

1. Finish counts(n2, stage). It gives a tuple of three numbers: the chromosomes, the DNA molecules and the DNA content in C.
2. Finish kinetochores(n2). It gives the number of kinetochores in a cell at metaphase.
3. Finish per_pole(n2). It gives the chromosomes that move to each pole in anaphase.