Biology 2581B Lecture Notes - Lecture 21: Canola, Gamete, Polyploid
24 Apr 2017
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Lecture 21 transposable elements and variations in chromosome. Transposable elements in the human genome: earlier evidence from roades but mcclintock developed the field of transposable. First evidence by marcus roades in 1930s and described in detail by barbara mcclintock in: first one to discover transposable elements saw through the colours of the kernels. They exist in many organism including mammals, insects, plants : don"t only exist in maize. Retrotransposons retroposons: transpose via reverse transcription of an rna intermediate, use rna intermediate to jump from one location to another in the genome. Transposons: transpose dna directly without an rna intermediate. Many different types some with cool names: mariner, gypsy, looper, springer, hopper, stalker, invader, diver, frogger: refer to different types of transposable elements and all have something to do with moving. Can be 50 bp to 10 kb in length (small or big) Differences in copy number exist between individuals or in a species.
