What Cells Undergo Mitosis?

Only the reproductive cells do this, the ones that will form sperm and eggs, and it is to give variation in offspring, as the DNA can be altered and sections swapped during meiosis, and it also gives the cells half the number of chromosomes so that at fertilisation the organism that forms has the normal number, without meiosis they offspring would have double the number of chromosomes and probably wouldn't live.

This is beacause Only the reproductive cells do this, the ones that will form sperm and eggs, and it is to give variation in offspring, as the DNA can be altered and sections swapped during meiosis, and it also gives the cells half the number of chromosomes so that at fertilisation the organism that forms has the normal number

The sex cells

The process in which eukaryotic cells divide into two daughter cells is called mitosis. During this division the chromosomes in a nucleus are divided into two similar sets. Two identical daughter nuclei are formed as a result of mitosis which are similar to parent nucleus. Mitosis take place in all cells of body except reproductive cells. The process in which sex cells are divided into two daughter cells is called meiosis.

During what part the mitosis process does the DNA replicate?

All cells

The sex chromosome(cells) will undergo meiosis.

It is during the interphase when the chromosomes replicate, or the DNA synthesis's