One diploid individual has total DNA content 2C which increases to 4C before the onset of mitosis. At anaphase, the DNA content is

One diploid individual has a total DNA content of 2C which increases to 4C before the onset of mitosis. At anaphase, the DNA content is 2C.
The DNA amount in the unreplicated gametic nucleus of an organism is referred to as its C-value, irrespective of the ploidy level of the taxon.
The DNA content is 2C, where C is defined as the mass of DNA present in a haploid chromosome set. As in the anaphase stage of mitosis, the diploid cell becomes haploid thus, the DNA content is also halved from 4C to 2C.