What is an example of imprinting?

First one needs to understand what imprinting is. One receives one copy of a gene from the mother, and another from the father. Sometimes the copy from mother or father is silenced, and only the copy from one parent is active. If the only active gene is damaged, it can show up in the form of genetic disease. An example of genomic imprinting, is the mixing of tigers and lions. Who the mother is, has direct effect on the offspring. A mother tiger and a father lion, results in a liger. Ligers are much bigger than either parent. A mother lion and a father tiger, results in a tigon. Tigons are about the same size as their parents. The difference in the two mixes come from genomic imprinting related to the maternal expression of certain genes.