SSC MTS EXAM

Detailed explanation-1: -Thus, DNA replication occurs in the S-phase of the interphase.

Detailed explanation-2: -Throughout interphase, nuclear DNA remains in a semi-condensed chromatin configuration. In the S phase, DNA replication results in the formation of identical pairs of DNA molecules, sister chromatids, that are firmly attached to the centromeric region. The centrosome is duplicated during the S phase.

Detailed explanation-3: -Explanation: During the G1 phase the cell grows and also carries out normal cellular functions. In the synthesis (S) phase the DNA is replicated resulting in two copies of each of the chromosomes.