The disproportionately high appearance of polydactylism among the amish suggests that a. it is a common mutation b. it is a common birth defect in pennsylvania c. it was overrepresented in the gene pool of the original amish settlers d. humans are prone to this birth defect

The answer is c. it was overrepresented in the gene pool of the original Amish settlers.

A founder effect is a result of geographical separation of a few individuals from the original population. Those few founding individuals will form a new population in which will be present alleles of the few founding individuals. It is probably that in founding individuals, in this example the original Amish settlers, polydactylism was overpresented, and since there was no gene exchanging with other population, polydactylism remained among Amish.

You should never redesign your experiment. try and see what in your experiment you made a mistake on or try and test your experimemt with somebody else. see if they get the right results.

It might. it might because if you think about if they discovered if we came from (lets say something funny like aliens) and thy found cells that matched and they would have t do more research about it but would most probably change their theory.