The oldest questions: why and how can parents transfer the basic traits Fertilization to their children? If babies develop from the combination (fertilization)of egg and sperm cells,what are really inside these cells to make them become the baby? A tiny man in the sperm cell?The oldest questions: why and how can parents transfer the basic traits to their children? If babies develop from the combination (fertilization) of egg and sperm cells, what are really inside these cells to make them become the baby? A tiny man in the sperm cell? Fertilization