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Comparison of the Olfactory Receptor Genes in Canines and Primates
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Biology majors |
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Dogs are known for their acute sense of smell. Humans are not. Do dogs have a higher percentage of functional olfactory receptors as compared to humans and other primates? Students will be assigned to obtain the full length genetic sequence of five olfactory receptor (OR) genes from their assigned OR family. (See website below.) Students will determine if a functional orthologous gene is present in the human genome, in the genome of a great ape, and in the sequence of a monkey. The class will pool their data and analyze for the percentage of pseudogenes present in each group. |
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http://www.bip.weizmann.ac.il/HORDE |
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“Loss of Olfactory Receptor Genes Coincides with the Acquisition of Full Trichromatic Vision in Primates”, Gilad, Y. et al., PLoS 2:120 (January 2004) “Evolutionary changes of the number of olfactory receptor genes in the human and mouse lineages” Niimura, Y. et al., Genes 346:23-28 (2005) |
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The same comparison can be made for other species or variance between human populations can be determined. |
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