DO YOU SEE WHAT EYE SEE CASE STUDY
1
One of Darwin’s main ideas was that evolution involves descentwith modification from common ancestry. We know today that themodification can be simply divergence in gene sequences. Thediagram to the right shows a phylogeny for the organismsrepresented in the sequences above. The degree of similarity ingene sequences is representative of how long ago two organisms havediverged from each other. In other words, organisms with a morerecent common ancestor will have a greater similarity in genesequences than organisms that have a much more ancient commonancestor. Make a hypothesis for which gene sequences listed aboverepresent each branch of the phylogeny.
2
There is variation in nucleotide sequences, but the amino acidsequences for the partial sequence presented in this case areidentical between the five species. Explain why natural selectionmight have favored conservation of the amino acid sequence.
3
How could different nucleotide sequences result in the sameamino acid sequences? Explain the mechanism.
4
How is Pax6 and other master genes like HOX different from othergenes? How does this difference affect evolution?
Thank you
