lecture 4 - speciation Flashcards
1
Q
define species
A
a population of reproducing organisms that is isolated from other populations
2
Q
allopatric speciation
A
eg: antelope squirrels- different species on grand canyon but birds there is no change
3
Q
genetic drift
A
eg snapdragon
4
Q
founder effect/ bottleneck effect
A
due to population suddenly crashing or moved from one place to another- loose rarer alleles
5
Q
sympatric speciation
A
speciation that occurs in same homeland
6
Q
examples of sympatric speciation
A
difference in uk and spanish birds- bevause of different migaratory times
7
Q
what causes speciation
A
different distribution - can hybridise
8
Q
how long does speciation take in animals
A
5 million years
