Eukaryotic chromosomes become visible with a light microscope before cell division because they
A) become less tightly wound.
B) become more tightly wound.
C) increase in length.
D) decrease in length.
E) combine with RNA.

Question

Quizplus · Accepted Answer

Being more tightly wound means that the DNA and protein are more densely packed and block more light in the microscope, increasing contrast.

Eukaryotic Chromosomes Become Visible with a Light Microscope Before Cell