MEDICAL PHYSIOLOGY

Detailed explanation-1: -Definition. A chromatid is one of the two identical halves of a chromosome that has been replicated in preparation for cell division. The two “sister” chromatids are joined at a constricted region of the chromosome called the centromere.

Detailed explanation-2: -Two chromatids are required to form a chromosome. A chromatid is one of two identical structures of chromosomes which already undergo replication. Two chromatids in a chromosome are known as sister chromatids.

Detailed explanation-3: -Sister chromatids are two identical copies of the same chromosome formed by DNA replication, attached to each other by a structure called the centromere.

Detailed explanation-4: -A replicated chromosome (or equivalently, a duplicated chromosome) contains two identical chromatids, also called sister chromatids. The difference between a duplicated chromosome and a chromatid, strictly speaking, is that a chromosome contains two chromatids that are joined at a structure called a centromere.