1
We see an enormous diversity of eyes in Kingdom Animalia. Until recently it was postulated that eyes must have evolved at least 40 times independently. Explain how the discovery of Pax6 (and its homologs such as eyeless ) has overturned this idea in favor of genes for eye development being present in an ancestor to all bilateral organisms.
2
Using the mouse Pax6 gene as a baseline, determine the similarity of the homologous genes from the unknown species.
For each unknown species, determine the number of nucleotides that are different from the nucleotides found in the mouse sequence. There are 60 nucleotides in each sequence. To determine the percent similarity, subtract the number of different nucleotides from 60, divide the result by 60, and multiply by 100.
1
We see an enormous diversity of eyes in Kingdom Animalia. Until recently it was postulated that eyes must have evolved at least 40 times independently. Explain how the discovery of Pax6 (and its homologs such as eyeless ) has overturned this idea in favor of genes for eye development being present in an ancestor to all bilateral organisms.
2
Using the mouse Pax6 gene as a baseline, determine the similarity of the homologous genes from the unknown species.
For each unknown species, determine the number of nucleotides that are different from the nucleotides found in the mouse sequence. There are 60 nucleotides in each sequence. To determine the percent similarity, subtract the number of different nucleotides from 60, divide the result by 60, and multiply by 100.
