Biology 1202B Lecture Notes - Lecture 8: Exon Shuffling, Meiosis, Provirus
23 Aug 2016
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Generating diversity ii: origins of variation new allele". Organisms contain particular segments of dna known as mobile elements. Mobile elements are more specifically known as transposable elements (te) Tes do not exist free of the dna. Tes are important because of the genetic changes they cause: produce mutations by transposing into genes and knocking out their functions, increase/decrease gene expression, are biological mutagens that increase genetic variability. The gene for transposase (an enzyme that catalyzes some of the recombination reactions for inserting or removing the te from the dna) At the 2 ends, is a short inverted repeat sequence (inverted version of the same. Dna); enables the transposase to identify the ends of the te: transposons. Has inverted repeat sequences enclosing a central region with more genes. Alleles could move from place to place in corn chromosomes. Tes are universally distributed among both prokaryotic and eukaryotic organisms. 9. 4c eukaryotic transposable elements are classified as transposons or retrotransposons.
