Chromatin

A: The material of which the chromosomes of organisms other than bacteria (i.e., eukaryotes) are composed. It consists of protein, RNA, and DNA.

B: Made of two homologous chromosomes, each consisting of two chromatids. Four chromatids pair up. It means that they exchange genes.

C: The center of the two chromosomes that holds them together. The centromeres split during anaphase 2

D: Testes or ovaries of the male or female reproductive organs