{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

BIO 24b-%20Allopatry - Outline 24b-Allopatry December 1...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 11/14/2008 1 24b-Allopatry December 1 Continued (draft as of Nov 14) 11/14/2008 2 Outline Allopatry by • Dispersal • Vicariance 11/14/2008 3 Great online info http://evolution.berkeley.ed u/evosite/evo101/VSpeciat ion.shtml 11/14/2008 4 How does speciation happen? Allopatric speciation— 1. geographic isolation followed by 2. increased diversity may lead to 3. reproductive isolation 4. divergence into separate species reproductive isolation is the critical end result if new species are generated
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 11/14/2008 5 Types of reproductive isolation { Prezygotic isolation individuals from different populations are unable to mate (gametes don’t meet)-but more than just physically/geographically separated { Postzygotic isolation individuals from different populations can breed, but the offspring produced have low or no fitness ( Table 26.1 ). 11/14/2008 6 Prezygotic reproductive isolation { Breed at different times { Breed in different habitats { Courtship is different { Egg & sperm are incompatible { Female & male genitalia are incompatible 11/14/2008 7
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.