AP BIOLOGY

Detailed explanation-1: -During S phase, genomic DNA is replicated and packaged into chromatin. The identical copies of each chromosome are known as sister chromatids, and they are tightly associated together through G2 phase and early mitosis.

Detailed explanation-2: -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.

Detailed explanation-3: -After DNA replication, each chromosome now consists of two physically attached sister chromatids. After chromosome condensation, the chromosomes condense to form compact structures (still made up of two chromatids). As a cell prepares to divide, it must make a copy of each of its chromosomes.

Detailed explanation-4: -How much DNA per chromatid? Each chromatid contains one double-stranded DNA molecule. Sister/Sibling Chromatids: The DNA molecules in sister chromatids are identical because they are the two products of a single semi-conservative DNA replication.

Detailed explanation-5: -Sister chromatids are the two halves of a given chromosome that are held together at the centromere. Replicated chromosomes are chromosomes that form after the cell has undergone DNA replication in order to prepare for cell division.