Step 3: make a claim. a) recall what you know about crossing over, independent assortment, and random joining of cells during reproduction. b) now, go back to the claims in step 2a. do you support these claims? if so, do you support the totality of the claims or just parts of the claims? c) based on your prior knowledge, make a claim about the factors that cause inherited genetic variations within populations. also make a claim about the effects of mutations. write your claim in your notebook.