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.

When the ball is rising up, it gains kinetic energy. when the ball reaches the very top, it will have all potential energy, until it falls back down and gains it kinetic energy. finally when you catch the ball or it falls back down, it would have gained its potential energy back.