Here's the breakdown:
* Chromosome: A long, thread-like structure made of DNA that contains genes.
* Gene: A segment of DNA that codes for a specific protein or function.
* Replication: The process of copying DNA.
* Chromatid: One of the two identical copies of a chromosome that are joined together by a centromere.
During DNA replication, each chromosome replicates, resulting in two identical copies called sister chromatids. These sister chromatids remain attached to each other at the centromere. This structure is essential for cell division, as the sister chromatids will separate during mitosis or meiosis, ensuring that each daughter cell receives a complete set of chromosomes.
