Final answer:
A cell with 10 chromosomes in the G1 phase will have 10 chromosomes and 20 DNA molecules after the S phase due to replication. The number of chromosomes and DNA molecules remains unchanged in the G2 phase. After mitosis and cytokinesis, each resulting daughter cell will have 10 chromosomes and 10 DNA molecules.
Step-by-step explanation:
If a cell in G1 of interphase has 10 chromosomes, then after the DNA replication that occurs during the S phase, there would still be 10 chromosomes per cell, but the amount of DNA would double.
Thus, there would be 20 DNA molecules present, as each chromosome would consist of a pair of sister chromatids leading up to cell division.
As the cell enters the G2 phase, it would still contain 10 chromosomes and 20 DNA molecules as no further replication of DNA occurs in G2.