Biology Skin Color Questions 1. How does high UV light affect folate storage? 2. Which skin color is favored in high UV light environments? 3. How does low UV light affect vitamin D production? 4. Which skin color is favored in low UV light environments? 5. What does it mean to say that skin color patterns are the result of convergent evolution? 6. Does similar skin color in a human race indicate all members of the race share a single common ancestor separate from other races?.