Biology of Skin Color Flashcards
Examples of non-visible genetic variation
cilantro taste aversion
bitterness of PTC
preferred wake up time
recombination
crossing over
recombination does not change
allele frequency
mutations create
new alleles
human choices create
artificial selection
successfulness in a particular environment
natural selection
What is for genetic change missing from raising wolves in a warm place, in captivity, with plenty of food to turn them into dogs?
differential survival; they don’t need to change because food and warmth and shelter are handed to them.
traits developed during an organism’s lifetime will not be passed
to their offspring
selective pressure
any reason for organisms with certain phenotypes to have either a survival benefit or disadvantage
selective pressure example about insects on leaves
dark bugs have higher survival because birds don’t see them and they are able to leave more offspring
Relationship between UV radiation and skin color
as UV radiation increases near the equator, skin color is darker
increase melanin on skin color
darker color
is darker skin a evolutionary result to protect from skin cancer?
no
UV breaks down…
folate
vitamin d
allows calcium uptake
