Question

What is a chromatid? And what's the difference between centrosome and centromere?​

Answer 1

Answer:

A chromatid is a chromosome that has been newly copied or the copy of such a chromosome, the two of them still joined to the original chromosome by a single centromere. Before replication, one chromosome is composed of one DNA molecule.

The main difference between centrosome and centromere is that a centrosome is a cylindrical structure which forms the spindle apparatus by controlling cell's microtubules where the centromere is a DNA region which holds the two sister chromatids together during the cell division.

Answer 2

Answer:

each of the two threadlike stands in which a chromosome divides longitudinally during cell division. each contsins a double helix of DNA