BIO 124 Chapter Notes - Chapter 18: Centromere, Hox Gene, Zygosity
24 Mar 2017
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18. 2 scientists use bioinformatics to analyze genomics and their functions. Dna replication/gene expression, and chromatin modifications: 90% of the region analyzed transcribed into rnas while less than 2% coded for proteins. Eukaryotic genomes tend to be larger (measured in mb) Introns are part of the dna sequence spliced out of before translation into protein. Intergenic dna is noncoding dna found between genes included in noncoding dna: repetitive dna is present in multiple copies in the genome, about three-fourths of repetitive dna is made up of transposable elements and sequences related to them. Introns may have promoted evolution of new proteins by facilitating duplication and shuffling of exons. Insertion of transposable elements within a protein-coding sequence may block protein production. Insertion of transposable elements within a regulatory sequence may increase or decrease protein production: transposable elements may carry a gene or groups of genes to a new position.
