Question

A cell at the end of S phase (DNA synthesis phase of interphase) contains 100 picograms of nuclear DNA. If this cell undergoes meiosis, there will be 25 picograms of nuclear DNA in each daughter cell.

Answer 1

During the S phase of interphase, DNA replication occurs and sister chromatids are formed. Meiosis reduces the chromosome number by half.

Step-by-step explanation:

During the S phase of interphase, DNA replication occurs, resulting in the formation of identical pairs of DNA molecules called sister chromatids. These sister chromatids are firmly attached to the centromeric region. The centrosome, which is responsible for organizing cell division, is also duplicated during the S phase.

When a cell undergoes meiosis, there will be 25 picograms of nuclear DNA in each daughter cell. Meiosis is a specialized form of cell division that reduces the chromosome number by half, resulting in the formation of haploid daughter cells.