how do the daughter cells at the end of mitosis and cytokinesis compare with their parent cell when it was in g1 of the cell cycle?

At the end of mitosis and cytokinesis, the two daughter cells are essentially younger “copies” of the original parent cell as it was in G1.

Direct comparison

• Each daughter cell has the same number of chromosomes as the parent cell had in G1 (same ploidy, e.g., 2n in humans).

• The DNA content per cell is the same as G1 : after S phase the DNA was doubled, but mitosis and cytokinesis split that duplicated DNA evenly so each daughter goes back to “G1-level” DNA.

• The genetic information (genes and alleles) in each daughter cell is the same as in the parent G1 cell; mitosis produces genetically identical nuclei (barring rare mutations).

• The types and basic set of organelles are very similar, because cytokinesis divides the cytoplasm and organelles between the two cells.

Key differences

• Each daughter cell is smaller in volume than the original G1 parent cell, because one large cell has been split into two.

• Some cytoplasmic components and organelles are divided more or less evenly but not in a perfectly “copy‑paste” way, so there can be minor quantitative differences between the daughters and the original cell.

So, in standard textbook terms, the daughter cells at the end of mitosis and cytokinesis are two smaller cells that are genetically identical to each other and to the parent cell when it was in G1, with the same chromosome number and DNA content that the parent had in G1.