topic 7 - types of variation among pops

Question 1

3 types of geographic variation

Answer 1

sympatric, parapatric, allopatric

Question 2

defin sympatric

Answer 2

opulations with overlapping geographic distributions

Occupy the same area; can frequently encounter each other

Question 3

define parapatric

Answer 3

opulations with adjacent but non-overlapping geographic ranges that come into contact

Question 4

define allopatric

Answer 4

○ Populations with separated distributions

Question 5

define sub species. why is it contesious? what does it provide?

Answer 5

• A recognizable distinct population occupying a different geographic area from others of the same species
  
  • Remains highly contentious, - traditional subspecies boundaries have been contradicted by molecular phylogenetic data
  • Often provides short-cuts for estimating patterns of intraspecific genetic diversity – hence, providing a useful tool for study of evolutionary divergence & conservation

Question 6

ex of sub species

Answer 6

begal vs sumatran vs siberian tiger
sourthern flicker
not 100% isolation but some

Question 7

define cline. example? bergmanns rule?

Answer 7

Gradual change in a character or allele frequencies over a geographic distance
White-tailed deer body size; larger in the North
Bergmann’ s Rule; Homeotherms tend to be smaller near the
equator than their more northerly or southerly conspecifics
Lateral line scales in suckers
o Shell colouration in snails