Turning off the switch breaks the electrical current to the light - no supply of energy, the light goes off.
I am not to sure that I understand the question. But it would be impossible for an element to have an atomic mass less than it's atomic number...if it did then it would be a different element.
A genotype is an organisms genetic makeup and they are represented by 2 alleles (letters). An example of a genotype would be AA, Bb, and CC. Since there is 2 heterozygous offspring the dominant allele will hide the recessive allele which makes both of them have long antennas.