system
Given the following post, respond as if you're commenting on Reddit:
human
Is all of a person’s dna in every cell?

Ie in all cells is the complete set of chromosomes in the nucleus even if the cell’s function is not being used by more than a tiny part of dna.
gpt
All nucleated cells (note, red blood cells and platelets lack nucleus) contain complete set of chromosomes. Epigenetic changes, not DNA, determine which genes are expressed and how much depending on the function of the cell.

In case of germ cells (eggs and sperms), they contain half the amount of chromosomes of course, aka "haploid."