NEET BIOLOGY

Detailed explanation-1: -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: -These identical copies are known as sister chromatids. These sister chromatids are held together by the centromere. G2 Phase: During G2, the cell makes proteins that are used in cell division. One of the proteins will be used in the formation of microtubules.

Detailed explanation-3: -In the S phase (synthesis phase), DNA replication results in the formation of two identical copies of each chromosome-sister chromatids-that are firmly attached at the centromere region. At this stage, each chromosome is made of two sister chromatids and is a duplicated chromosome.

Detailed explanation-4: -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-5: -Sister chromatids are two identical copies of the same chromosome formed by DNA replication, attached to each other by a structure called the centromere. During cell division, they are separated from each other, and each daughter cell receives one copy of the chromosome.