Fill in the blanks. 1. Chromatic fibre is made up of DNA and.................... 2.The chromatids are attached to each other at.................. 3.The structure of DNA was first discovered by................ Share with your friends Share 0 Pankaj Kumar answered this 1. Histone proteins. 2. Centromere. 3. Watson and crick 1 View Full Answer Harish K answered this 1.histones 2.centromere 3. 0