Question

well,chromosome consists of 40%DNA and 50%of histones!but how can the %of histones b more than the % of DNA?

Answer 1

Histones are comprised of proteins that aid in the wrapping/condensing of the DNA in a cell. Since histone complexes are large groups of proteins, it would make sense that they make up more of a chromosome than DNA.

Answer 2

Here is a link explaining them, including pictures:

http://biology.kenyon.edu/courses/biol114/Chap01/chrom_struct.html