Question: Consider Mendel's cross of pea plants with smooth, yellow seeds with pea plants with green, wrinkled seed that was reviewed in the Introduction. What if the "S" and "Y" genes were linked (on the same chromosome) instead of independently assorting. Assume that S and Y alleles always are inherited together (remain together on the same chromosome) and that s and y alleles always are inherited together. What F2 phenotypic ratio would Mendel have observed if this had been the actual situation?

Question: Why is immunogold electron micrography useful? Be sure to describe how it works in your explanation, please.