Thursday, February 9, 2012

Lines of Evidence for Evolution

1. Homologous Structures!
2. Vestigial Structures!
3. DNA Analysis!
4. Embryological Similarities!
5. Fossil Evidence (Transitional Animals)!

Homologous Structure:

Vestigial Structure

3. DNA - 

- Chimpanzees are 96% to 98% similar to humans, depending on how it is calculated. (source)

- Cats have 90% of homologous genes with humans, 82% with dogs, 80% with cows, 79% with chimpanzees, 69% with rats and 67% with mice. (source)

- Cows (Bos taurus) are 80% genetically similar to humans (source)

- 75% of mouse genes have equivalents in humans (source), 90% of the mouse genome could be lined up with a region on the human genome (source) 99% of mouse genes turn out to have analogues in humans (source)

- The fruit fly (Drosophila) shares about 60% of its DNA with humans (source).

- About 60% of chicken genes correspond to a similar human gene. (source)

The number of genes across a few tested species can be compared on HomoloGene.



5.Fossil Record

Where four limbs evolved in the vertebrate clade

Vertebrate phylogeny with time 

Cladogram of select 
vertebrates showing where certain characters appear

Download this graphic from the Image library.

No comments:

Post a Comment

Note: Only a member of this blog may post a comment.