Solution

The DNA sequences that move from one location on the genome to another are called as transposable elements (TEs) or "jumping genes". Their movement may cause mutations and also can duplicate or reduce the amount of DNA in the genome of the cell. Barbara McClintock studied variations in the colour of kernels of corn. She observed that genetic information is not stationary. She isolated two genes responsible for pigmentation and found that the genes could move along the chromosome to a different site; she termed them "jumping genes".