Mendel's Law of Independent Assortment states that each allele pair segregates independently during the process of gamete formation. In this animation you can see how independent assortment works in a dihybrid individual, that is, an individual who is heterozygous at two gene loci (R and Y). We already know from the Law of Segregation that 1/2 of the gametes will have the dominant allele for each gene, and 1/2 of the gametes will have the recessive allele. The Law of Independent Assortment now establishes that the R allele can come together randomly with either the Y or the y allele during gamete formation, as can the r allele, generating equal proportions of RY, Ry, rY and ry gametes. The Law of Independent Assortment assumes that the genes under consideration are not linked.
