The option that contains all of the other options listed is "chromosome."
Here's the reasoning:
- A chromosome is made up of chromatin, which includes both chromatids and genes.
- Each chromosome typically consists of two chromatids (sister chromatids) joined at a centromere.
- Genes are segments of DNA found on chromosomes.
So, in essence, a chromosome includes centromeres, chromatids, and genes within its structure.