The results of genetic crosses derived from punnet squares assume that each gamete contains one allele for each trait, which come from mendel's law of segregation, and that collectively the gametes have all possible combinations of alleles, using mendel's law of .

Independent assortment

Explanation:

The law of independent assortment says that genes for different traits or characteristics assort independently from each other during gamete formation. So each contrasting character's pair assort independently and do not show any association with the pair of other characters.

So after gamete formation collectively the gametes have all the possible combinations of alleles because all the genes are assorted independently in gametes.

This independent assortment of traits leads to some new combination of characteristics in the offspring. Therefore the correct answer is independent assortment.

what's the question?

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs