How does mitosis form new cells that maintain the chromosomes number in the parent cells?

Answer 1

Mitosis is the process by which multicellular organisms (like ourselves) replicate or copy their chromosomes of the nucleus within their cells.  I does this so that it can actually replicate it's cells.  The actual process of mitosis is divided into many phases.  One of these phases is called "S-Phase" (S is for synthesis), wherein a copy of the chromosomes are synthesized.  After that the cell goes through prophase, metaphase, anaphase, & telophase.  These other phases basically mean the chromosomes copies align together at the equator or center of the cell and then separate off toward two separate ends while the cell divides itself.  Thereby creating 2 daughter cells with the same genetic material (or chromosomes) the parent cell had.  Mitosis IS the process by which chromosome material is passed from parent cell to daughter cells.  The process within mitosis whereby the chromosome material is copied is the S-Phase.  

Answer 2

During interphase, the DNA in a cell is copied so the cell momentarily has double the amount of genetic material. That way, during mitosis, when the cell splits into two, each daughter cell has the full number of chromosomes, and the same number of chromosomes as the parent cell.

Answer 3

Mitosis is the process by which cells divide to produce two identical daughter cells with the same number of chromosomes as the parent cell. During mitosis, the chromosomes replicate and then separate into two equal sets that are distributed into the daughter cells. This ensures that each daughter cell receives the correct number of chromosomes and maintains the same ploidy as the parent cell.