Animal and plant cell nuclei contain thread-like structures called chromosomes. A single molecule of deoxyribonucleic acid and a protein make up each chromosome (DNA).
Even under a microscope, when a cell is not dividing, chromosomes cannot be seen in the nucleus of the cell. However, during cell division, the DNA that makes up chromosomes gets more compactly packed and may be seen under a microscope.
A DNA molecule called a chromosome is where an organism's genetic code is located. The tight, coiled architecture of the chromosomal structure is made up of the DNA of the organism and specific proteins.
To know more about type of Chromosomes visit:-
https://brainly.com/question/28265947
#SPJ4