Biology 3rd Edition by Peter Russell, Paul Hertz, Beverly McMillan

Exercise 2

Eukaryotic chromosomes can be labeled by exposing cells to radioactive thymidine during the S phase of interphase.If cells are exposed to radioactive thymidine during the S phase, would you expect both or only one of the sister chromatids of a duplicated chromosome to be labeled at metaphase of the following mitosis (see Section 10.2)?