Question

what tells your cells what to do?
□ the brain
□ the parent cells
□ genes
rewatch

Explanation:

Genes are segments of DNA that contain instructions for the development, functioning, and reproduction of cells. They determine cell - specific functions and characteristics, not the brain (which controls organ - level functions and not detailed cell - level instructions) or just parent cells (while parent cells pass on genes, it's the genes themselves that carry the instructions).

Answer:

genes