Evo lut i on and Gene Frequenc ie s

By: Levi Webster and Ally Whitacre

Zoo 1 2007-2008

Allopatric, Parapatric, and Sympatric Speciation

SpeciationDefinition

Reproductive Isolation

Gene Pool

Allopatric Speciation

Geographic isolation

•Barriers

•Distance

Tyler

Allopatric Example

Spider Stowaways

Tetragnatha viridorufa http://www.southindianspiders.com/south-indian-spiders3.htm

Parapatric Speciation

Demes - subpopulations

Parapatric ExampleWolves in

Montana

http://www.hoothollow.com/Trip%20Report%20-%20Animals%20of%20Montana%20Jan%202006.html

http://www.netstate.com/states/geography/mapcom/mt_mapscom.htm

Sympatric SpeciationNo large

scale

Niche

Northern Ghost Bat

Diclidurus albushttp://blogs.law.harvard.edu/crofot/

Sympatric Example

Question 1 Throughout a large coral reef system lives

a population of clown fish. Some prefer to live in a more elevated section of the reef, while the others prefer a more secluded region. This could result in what type of speciation?

A. Allopatric B. Parapatric

C. Sympatric

Question 2 Millions of years ago, a major geographical

event occured that resulted in worldwide speciation. What was the event and what was the primary type of speciation that resulted?

Continental drift; Allopatric

Question 3 A species of tortoise lives on a grassy plain.

They are herbivores and enjoy grasses and leaves. One group of this species, over time, develops a longer neck to eat leaves easier. What type of speciation is this?

A. Allopatric

C. ParapatricB. Sympatric

References Sympatric Speciation, Accessed on Oct. 10, 2007

http://evolution.berkeley.edu/evosite/evo101/VC1eSympatric.shtml

Allopatric Speciation: The Great Divide, Accessed on Oct. 9, 2007

http://evolution.berkeley.edu/evosite/evo101/VC1bAllopatric.shtml

Parapatric Speciation, Accessed on Oct. 9, 2007

http://evolution.berkeley.edu/evosite/evo101/VC1dParapatric.shtml