Explanation

The nucleus takes dyes due to the presence of chromatin.

It is a complex of DNA and proteins that make up the chromosome.

Chromatin is responsible for staining with basic dyes, such as hematoxylin and eosin.

They are commonly used in histology and cytology to visualize cell nuclei.

Chromatin is composed of:

• DNA (the genetic material)
• Histone proteins (which form a structure called a nucleosome)
• Non-histone proteins (which regulate gene expression and chromatin structure)