science 7 Flashcards
study
what is Good/Beneficial?
helps an organism to
better adapt to its environment;
ex: white vs. brown rabbit in Alaska,
Siberia
what is neutral?
common; neither helpful or
harmful
what is Bad/harmful?
CANCER; no fertilization,
dead embryo, dead fetus, dead newborn
(miscarriage); genetic disorders/defects
(Hemophilia, Cystic Fibrosis).
what’s are Substitution?
remove a base pair, then
in its place add a new base pair
what are deletion?
remove a base pair only
what are addition?
add a base pair
What causes of mutations?
1] chemical (ex: nicotine, gasoline)
2] radiation (ex: gamma rays, X rays)
3] genetic (ex: triple negative breast cancer)
4] fried foods [transfats(banned 6/17/2015): french fries,
potato chips, fried chicken, peanut butter,
donuts]
what are variation?
allows a species to best adapt
to a rapidly changing environment thereby
increasing chance of survival.
What can we do to stop getting cancer?
Maintain healthy weight
eat healthy
exercise regularly
avoid sun
and more
what are multiple alleles?
A blood AA,A
B blood BB,B
AB blood AB
O recessive blood II
what are two alleles?
T tall
t recessive
what are one gene trait?
50% dad
50% mom
what are The sex chromosomes?
23rd pair
what are sex-linked genes?
Sex-Linked Genes: genes carried on sex
chromosomes; example red-green colorblindness
what are carrier?
a person who does not show the observable trait but is
carrying the hidden recessive allele on the sex chromosome.
