the readily stainable substance of a cell nucleus consisting of DNA and RNA and various proteins; during mitotic division it condenses into chromosomes
"Under the microscope, the chromatin in these dividing cells had condensed tightly to form distinct chromosomes."
A complex of DNA, RNA and proteins within the cell nucleus out of which chromosomes condense during cell division.
"During mitosis, the loose chromatin in the cell nucleus tightly coils to form visible chromosomes that can be easily counted under a microscope."