1 Copy number variation (CNV) is a type of mutation where large chunks of DNA are inserted, repeated or lost. 2  These regions of DNA can be between 10,000 and 5,000,000 bases long. 3  Duplication of genes. 4  When there is an increase in the number of copies of a gene. 5  Deletions of large regions of the chromosome.
Microwaves are basically small (micro) waves of radio frequency energy. It cooks the food by vibration (waves) creating friction from within, thus creating heat. This is why it cooks from the inside-out as opposed to heat which must be absorbed from the outside-in. Microwaves are high energy electromagnetic waves.
If you were to put food in a heavy metal pan and put it in the microwave, it wouldn't cook. The pan would shield the food from the microwaves, so the food would never heat up. Other metals are a no-no in the microwave, too. Tim Flach/Riser/ Getty Images. Tiny sharp pieces and thin pieces of metal are a different story.