When a gene "jumps" to different positions within the corn kernel, a color gene is "turned on" or "turned off" depending on whether it lands next to a pigment gene or not. Barbara McClintock's discovery of these jumping genes earned her the Nobel Prize.
Mosaic Pumpkin: Cut up pieces of masking tape, stick them on your pumpkin, spray paint your pumpkin black. Let dry, then peel the masking tape off and you have a mosaic pumpkin! ~ Let the boys make their own designs- way better than carving!