What is the function for chromatin?

Chromatin is the material that makes up a chromosome that consists of DNA and protein. The major proteins in chromatin are proteins called histones.

The reason that chromatin is important is that it's a pretty good packing trick to get all the DNA inside a cell.

the offspring would all be white. if the parents are both white flowers then they have the genotype rr, which when crossed results in an all white punnet square.

your spelling is a little off : ]