The grafting of a second polarizing region into the anterior of a limb bud results in (1) formation of a second bud at the site of (2) formation of extra copies

The grafting of a second polarizing region into the anterior of a limb bud results in (1) formation of a second bud at the site of (2) formation of extra copies of the anterior- the graft most digit, digit 2, is the only possible result (3) formation of extra copies of the posterior-most digit, digit 4, is the only possible result 4) a new axis can be formed if the second polarizing region is large, and a second full set of digits can form with mirror- image orientation to the normal set of digits