Please answer the following essay questions.

1		Explain how the genetic distance maps for Ireland and the ancient Egyptians help determine past migrations of peoples. What were the conclusions for the origin of inhabitants of midland counties of Ireland? What were the conclusions for the origin of the ancient Egyptians?
2		Describe how such factors as vitamin D synthesis, sunburn, and folate deficiency have played a role in the evolution of dark and light skin in humans. What is the relationship of skin color to the equator?