How are chromatin,chromatid,and chromosomes related to each other?

(N/A) Chromatin is the loose,thread-like form of $DNA$ and proteins found in the nucleus during interphase. When a cell prepares to divide,this chromatin condenses into thicker,distinct structures called chromatids. $A$ chromosome is the structural unit formed by one or two identical chromatids (sister chromatids) joined at the centromere,which serves to package and organize genetic material for cell division.