A diploid cell after mitosis will have the same number of chromosomes as the parent cell.

Here's why:

* Mitosis is a type of cell division that produces two identical daughter cells.

* Diploid cells have two sets of chromosomes (one set from each parent).

* During mitosis, the chromosomes are duplicated, and then the cell divides, ensuring each daughter cell receives a complete set of chromosomes.

Therefore, if a diploid cell starts with 46 chromosomes (like a human cell), each daughter cell after mitosis will also have 46 chromosomes.