intro to evolution Flashcards
(8 cards)
1
Q
what is evolution?
A
change in heritable characteristics over number of generations
2
Q
what do DNA mutations lead to?
A
different phenotypes in the cell
3
Q
what happens if the cell is better suited? what is this called?
A
it is ADAPTED. this could lead to this characteristic becoming the dominant characteristic
4
Q
are mutations typically beneficial or detrimental?
A
detrimental, as organisms are complex
5
Q
are mutations common or rare?
A
rare
6
Q
what is natural selection?
A
increase in advantageous characteristics in a population over time
7
Q
what is genetic drift?
A
mechanism of genetic change when genes are selectively neutral. can change dominant allele that has no effect on survival
8
Q
what is speciation?
A
populations evolving separately from each other due to barriers
