If there is a mutation in a zygote, where is it likely to be found in the fetus?. Answer. A.The mutation will occur in all the cells of the fetus since they all formed by mitosis from the zygote.. B.The mutation will only be found in the types of cells in the fetus that could be harmed by the mutation and not in any others... C. The mutation will only be in the one cell that was the original zygote and the other cells of the fetus will not have it.. D. The mutation will show up in any fetal cells formed by mitosis but not in those formed by meiosis.