Jackmohan2007 Would that mean people in colder countries (who have much less sun round the year) have darker hair and people around the equator have lighter hair? ...:-)
people that live around the equator do generally have lighter hair and darker skin because of the hot climate (west Africa for instance). There are always exceptions to this because of genetics, migration of people as well as terrain, i.e people who live in the mountains are more exposed to UV rays than those who live in inner cities and therefore will have a darker skin.
I was answering this in the context of the physiological effects of UV rays on the melanocytes cells that produce melanin which absorbs UV rays to protect our skin from cancer such as melanoma.
people in colder climates have lighter skin but can get darker skin by exposing themselves to artificial UV radiation thru a procedure called Tanning.
Jackmohan2007 Would that mean people in colder countries (who have much less sun round the year) have darker hair and people around the equator have lighter hair? ...:-)
people that live around the equator do generally have lighter hair and darker skin because of the hot climate (west Africa for instance). There are always exceptions to this because of genetics, migration of people as well as terrain, i.e people who live in the mountains are more exposed to UV rays than those who live in inner cities and therefore will have a darker skin.
I was answering this in the context of the physiological effects of UV rays on the melanocytes cells that produce melanin which absorbs UV rays to protect our skin from cancer such as melanoma.
people in colder climates have lighter skin but can get darker skin by exposing themselves to artificial UV radiation thru a procedure called Tanning.