AP BIOLOGY

Detailed explanation-1: -Because each chromosome was duplicated during S phase, it now consists of two identical copies called sister chromatids that are attached at a common center point called the centromere.

Detailed explanation-2: -During S phase, each chromosome is replicated. This produces a second copy of each chromosome from the mother and a second copy of each chromosome from the father. These identical copies are known as sister chromatids. These sister chromatids are held together by the centromere.

Detailed explanation-3: -Definition. Following DNA replication, as part of cell division, each chromosome consists of two full length DNA molecules joined at the centromere. These two DNA molecules are sister chromatids.

Detailed explanation-4: -prophase – chromosomes condense; each chromosome consists of a pair of identical sister chromatids joined at the centromere.

Detailed explanation-5: -The two copies of a chromosome are called sister chromatids. The sister chromatids are identical to one another and are attached to each other by proteins called cohesins.