The experimental results supported the hypothesis that each allele pair segregates independently during gamete formation . This behavior of genes during gamete formation is referred to as Mendel's law of independent assortment . Each allele pair segregates independently of other gene pairs during gamete formation. Mendelian inheritance reflects rules of probability Segregation and independent assortment of alleles during gamete formation and fusion of gametes at fertilization are random events. The probabilities of all possible outcomes for an event must add up to 1.
Random events are independent of one another.
The outcome of a random event is unaffected by the outcome of previous such events. The probability that independent events will occur simultaneously is the product of their individual probabilities. This rule also applies to dihybrid crosses.