Starting with a fertilized egg (zygote), a series of five mitotic divisions would produce an early embryo with how many cells?

32 cells

Explanation:

In each mitotic division, from one cell you are going to have at the end 2 cells. That means that to calculate the number of cells you need to use the formula 2n so 2 at the 5th power will it be 32. In the embriotic process this is called morula by the number of cells.