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Homology vs. Homoplasy - PowerPoint PPT Presentation


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Homology is any similarity between characters that is due to their shared ancestry. Homoplasy occurs when characters are similar, but are not derived from a common ancestor. . Homology vs. Homoplasy. Homoplasy often results from convergent evolution .

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homology vs homoplasy
Homology is any similarity between characters that is due to their shared ancestry

Homoplasy occurs when characters are similar, but are not derived from a common ancestor.

Homology vs. Homoplasy

Homoplasy often results from convergent evolution.

What type of characters do we use to determine evolutionary relationships?

are bird and bat wings homologous
http://www.fs.fed.usAre bird and bat WINGS homologous?

lazybirder.blogspot.com

No, they are homoplasious.

slide7

Are the position of the eyes in C and D an example

of homology or homoplasy? Homoplasy.

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Can you think of other examples of homoplasy that result from convergent evolution?

  • Marsupial thylacine and mammalian canids
    • Similar skulls, sharp teeth, powerful jaws, raised heels and the same general body form
    • Thylacine most closely related to Tasmanian devil

Thylacine

Timberwolf

  • Old and New World Vultures
    • Both eat carrion
    • Old World vultures related to eagles, New World vultures related to storks

Nubian vulture

Turkey vulture