20- genetic drift 1 Flashcards
1
Q
can a chance event such as a hurricane lead to evolution?
A
yes, chance events can lead to significant shifts in the proportion of lizards with a certain trait
2
Q
what is this chance event called?
A
genetic drift
3
Q
what is the bottleneck effect?
A
genetic drift:
some individuals will die due to an environmental event like a hurricane
4
Q
what is the effect of randommating?
A
genetic drift:
By chance, some individuals will have more offspring than others
5
Q
what is the founder effect?
A
genetic drift:
some individuals will immigrate to a new island
6
Q
are large or small populations effected more by chance events?
A
small - less genetic variation
