How many characters for chromosomes are not correct from given characters? (i) Interphase nucleus has a loose and indistinct network of nucleoprotein fibres called chromatin. (ii) The name chromatin for material of the nucleus was given by Flemming. (iii) Chromatin consists of DNA and some basic proteins called histones, some non-histone proteins and RNA. (iv) A single human cell has approximately two metre long thread of DNA distributed among its forty six chromosomes. (v) Every chromosome essentially has a primary constriction or the centromere. (vi) Every chromosome have non-staining secondary constrictions.