Biology 1002B Lecture 21: Genome Evolution Mar 21
30 Mar 2016
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Genes are about 10kb and can also use either strands. Huge genes very long compared to prokaryotic and much less density on the double stranded. Observe the picture: the light pink is the exon and the intron is the dark red. Introns is by far the majority of a gene. Vast majority of gene is intron: coli, uses a large portion of its genome to for coding genes, higher gene density. Gene duplication: gives rise to gene families, genes can be similar because of gene duplication, globin and hemoglobin. Paralogs: genes that are the same that are related because of duplication, very similar because arisen by gene duplication. Orthologs: sequences that are similar because of having a common ancestor, however, they can diverge. New genes formed during evolution: unicellular animal cell that was on the way to multicellularism. Blue, pink: outside of cell, binding domains -
