Answered

3 When exposed to ultraviolet (UV) light, human
skin cells produce the protein melanin. This
protein helps protect skin cells from damage
caused by UV light. This is an example of
(1) a gene that cannot be passed on to offspring
(2) natural selection producing a new species
(3) sexual reproduction that will produce
variation
(4) environmental
expression
factors affecting gene



Answer :

GinnyAnswer

Final answer:

Human skin produces melanin when exposed to UV light to protect against damage and maintain Vitamin D levels.


Explanation:

When exposed to ultraviolet (UV) light, human skin cells produce the protein melanin to protect themselves from UV damage. This process is an example of environmental factors affecting gene expression. Dark skin, rich in melanin, acts as a natural sunblock, preserving Vitamin D levels crucial for bone health. Evolutionary pressures have led to variations in skin pigmentation among populations adapting to different levels of UV exposure.


Learn more about Melanin production and skin protection here:

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