Here's a breakdown:
* Chromosome: A long, thread-like structure of DNA found in the nucleus of a cell. It carries genetic information.
* Chromatid: One half of a duplicated chromosome. The two chromatids are identical copies of each other and are joined together at a point called the centromere.
* Duplication: This process, known as replication, happens during the S phase of the cell cycle.
After replication, a chromosome consists of two identical chromatids. These chromatids remain attached at the centromere until they separate during cell division (mitosis or meiosis).
