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Unformatted text preview: 10. Do any chromosomes lack alu sequences? If so, why might this be so? 11. Some of the au sequences have not been placed. Why might this occur? EXERCISE 3. FINDING THE GENE FOR COLORBLINDNESS 12. How many genes for color blindness are on the X chromosome? 13. How many introns are there in this gene and how long is the processed mRNA? 14. Move to the left of OPN1MW and find OPN1LW. How many introns does it contain? 15. Where is the gene for OPN1MW2? 16. Zoom in and provide below the first 12 bases of the OPN1MW gene. Translate these to the first 4 amino acids in the protein chain. 17. What information does this give you about the opsin genes on the X-chromosome (summarize)? 18. Speculate on the kinds of mutations that might result in colorblindness. 19. What does the tree say about the age of this gene sequence? Cite your evidence. 20. What organism has genes that are closest to human? Give scientific and common name....
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