Talk in general about chromosomes.

Chromosome means colored body, each chromosome is made up from one DNA molecule associated with many protein species (histones and non-histones) representing up to 50% of its weight. in addition to a small amount of RNA (RNP) Nearly all chromosomes are linear structures having a primary constriction named centromere and two ends named telomeres. Two arms may be different in size with index centromeric (p/p+q) that reflects the position of the centromere which is a characteristic of each chromosome.