How Do Chromosomes Become Visible Under a Light Microscope as a Cell

Question

How do chromosomes become visible under a light microscope as a cell prepares to divide?
A) The cell becomes flat and thin, and its internal structures become easier to see.
B) Thin strands of chromatin coil tightly and then coil again.
C) DNA is thicker after it has replicated.
D) Chromosomes become more intensely colored before cell division.
E) Chromosomes are created before cell division, and then broken down afterward.

Accepted Answer

Thin strands of chromatin, which are made up of DNA and proteins, tighten and condense into visible chromosomes during cell division. This process is called chromosomal compaction or condensation.