Thursday, September 19, 2013

Transposons

Transposons are sequences of DNA that can move or transpose themselves to new positions within the genome of a single cell. The mechanism of transposition can be either "copy and paste" or "cut and paste". Transposition can create phenotypically significant mutations and alter the cell's genome size. Barbara McClintock's discovery of these jumping genes early in her career earned her a Nobel prize in 1983.

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lordosis

  Lordosis is historically defined as an abnormal inward curvature of the lumbar spine.