One of a pair of duplicated chromosomes produced
during the S phase of the cell cycle, which
are joined together at the centromere. Chromatids
become visible during prophase and metaphase
of mitosis or meiosis.
They separate at anaphase and are then
known as daughter chromosomes.
|(1) Chromatid. One of the two identical
parts of the chromosome after S phase. (2) Centromere. The point where
the two chromatids touch, and where the microtubules attach. (3) Short
arm (4) Long arm.