Gametes are sex cells (aka sperm and eggs), which contain the traits and alleles like Aa or aa. These traits are randomly selected from each parent to create a new individual, with the dominant trait having a greater percentage of showing up and recessive trait having a lower percentage. Hope this helped! :)
Gamete refers to the cell. It can be a male cell. It can be a female cell. Genotype refers to the genetic makeup, composition, or structure of a specific organism.