There are many developmental stages that a human undergoes between fertilization and birth. Immediately following which stage does
cellular differentiation begin?

W

Explanation:

Because when the sale starts invited it starts out as a singular cell, then divide itself into two and it continues to divide itself. So the answer that would make the most sense would be W because it starts out with only two.

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.