As a result of what process is the diploid set of chromosomes restored in cells?

A haploid (single) set of chromosomes is contained in gametes. These are sex cells that are essential for reproduction. Gametes carry the unique genetic information of the parent organism.

However, multicellular organisms have a predominantly diploid set of chromosomes. This is achieved due to the fact that gametes participate in the fertilization process. At the same time, they merge and from two haploid cells one diploid – a zygote is formed. A new organism that will develop from a zygote will carry a combination of traits from both parents at once.