Explain two ways in which genetic variation is preserved in a population

I believe this happens through Diploidy and Heterozygote advantange. During meiosis the cells produces gametes, or germ cells, each containing half the normal or somatic number of chromosomes a condition known as haploidy. When two gametes cells unite the diploid condition is restored. Heterezygote advantage involve maintenance of two alleles because heterozygote individuals are more fit and adaptable.