Law of segregation: This law states that the two alleles of a pair segregate or separate during gamete formation such that a gamete receives only one of the two factors. In homozygous parents, all gametes produced are similar; while in heterozygous parents, two kinds of gametes are produced in equal proportions.
Law of natural selection: One of the basic mechanisms of evolution is the gradual change in the trait of an organism by which organisms better adapted to their environment tend to survive and produce more offspring and the individuals that are poorly adapted to their environment are less likely to survive and reproduce, may become extinct. The term "natural selection" was first used by Charles Darwin