According to Dr. Jablonski's work, which of the following is NOT an evolutionary constraints on skin color? Group of answer choices dark skin is an ancestral trait we share with our non-human primate ancestors melanin in darker skin protects folate from degradation by UV light near the equator melanin in darker skin protects the skin from UV damage that can lead to skin cancer lighter skin allows for vitamin D production with low levels of UV-B at high latitudes
Added by Ryan D.
Step 1
Jablonski. These constraints include the protective functions of melanin against UV light and the need for vitamin D production in varying UV conditions. Show more…
Show all steps
Your feedback will help us improve your experience
Adi S and 78 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Which of the following is false regarding the cause of diversity and distribution of skin pigmentation in humans around the world? Skin cancer could have been a strong selective force in driving human skin pigmentation patterns if it had a minor influence on our ability to reproduce. Natural selection, mutation, and genetic drift all play a role in the diversity and distribution of skin pigmentation in humans around the world. Populations living near the equator tend to have darker pigmented skin because having more melanin protects folate from being broken down by intense UV light, and at this high UV light intensity, enough UV light is absorbed to make enough vitamin D in individuals with dark skin pigmentation. Human populations at higher latitudes have light pigmented skin, as this trait increases survival and reproduction because it allows the synthesis of vitamin D at lower UV light intensities, and still provides enough protection of folate against UV light. Diversity in the genes that influence skin pigmentation occurred before the alleles changed in frequency over time.
Adi S.
How does skin cancer not exert enough evolutionary pressure to account for darker skin in humans? How does folate deficiency exert enough evolutionary pressure to account for darker skin in humans? What is one indispensable function of UVB rays in the human body? How does this exert evolutionary pressure on human skin color? Briefly describe the two reasons why the Inuit people exhibit somewhat darker skin levels than would be predicted given the UV levels at their latitude. What theory do the authors propose for why women generally have lighter skin than men? Briefly explain why skin color is described as "one of the least useful characteristics in determining the evolutionary relations between human groups"?
Madhur L.
Question 1 Why did natural selection favor dark skin in areas near the equator? protects individuals from painful and damaging sunburn allows for better vitamin D production protection of folate in the capillaries protects individuals from skin cancer
Marlyn J.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD