AP2-1.4: Skin Color

Which of the following is most responsible for the skin color of dark-skinned people?

• melanin

• carotene

• hemoglobin

• cyanosis

Melanin protects

• Vitamin D breakdown

• Folate breakdown

• DNA mutations

• Bones from breakdown

What is melanin?

• A protein pigment that absorbs and reflects light
• A protein that is waterproof and tough
• A cell found in the epidermis
• A vitamin that helps you sleep

What kind of cells create melanin?

• Keratinocyte
• Melanocyte
• Leukocyte
• Erythrocyte

What are the two types of melanin?

• Light melanin and dark melanin
• Eumelanin and Dysmelanin
• Eumelanin and Pheomelanin
• All of the above

Different tones of human skin color evolved 

• in response to varying levels of UV radiation in the environment
• Randomly and for no reason at all

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-5

What is Pheomelanin?

• A type of melanin that produces dark brown/black skin

• A type of melanin that produces reddish/yellow pigment

• An enzyme that controls skin color

• An enzyme that produces melanin

If a person lives in an environment with low radiation what kind of skin color would be the best adapted

• Darker skin tones to increase production of Vitamin D Synthesis
• Darker skin tones to protect DNA and Folate
• Lighter Skin tones to increase production of Vitamin D
• Lighter Skin tones to protect DNA and Folate

How does melanin protect cell's DNA from the damaging effects of Ultraviolet light?

• It relies on folate

• It doesn't you must use sunscreen

• it activates vitamin D3 production which takes care of that

• Forms a protective cap over the nucleus of skin cells

A group of inherited disorders characterized by little or no melanin production

• Albanism

• Pedigree

• Karyotype

• Punnett Square

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2