Answer:
In asexual reproduction, the chromosome number is maintained by making reproductive structures like the buds or by processes like regeneration, Since these are formed from body structures, they have the same number of chromosomes as that of the parent.
In cells like bacteria, the chromosome number is maintained constantly by binary fission
During sexual reproduction, gametes and their fusion help maintain a constant chromosome number, the cell's gametes undergo meiosis where the chromosome number is reduced to half.