Question

multiple - choice question each chromosome usually consists of two sister cells chromatins centrioles chromatids

Explanation:

Chromosomes in cell - division stages are composed of two sister chromatids. Cells are the basic units of life and not part of chromosome structure. Chromatin is the un - condensed form of DNA and proteins. Centrioles are involved in cell division but not part of chromosome composition.

Answer:

D. chromatids