Until a few years ago, scientists assumed that the DNA dictates exactly how a cell has to develop, however in recent years scientists have discovered that the DNA is more flexible than anyone had previously thought. DNA contains a code that indicates the boundaries of what can be developed, but there are numerous variations within DNA that can be put on or off, making different developments possible. You can compare this phenomenon to the way software in a computer works: you can always choose to do something or not to do something. The impact of environment is something scientists have discovered very recently. The impact that these factors have is particularly exercised at the moment the sperm and the egg are formed, just before fertilization. The genome gets information about the conditions outside the body. For example, if at that time there is a famine, the spermatozoon will record that information and put some pieces of DNA on and turn on other bits off. These pieces of DNA are called exons. That process of turning on and off is called epigenetics. On the one hand we find the scientists who exert influence on our DNA; on the other hand are the grandpas and grandmas, brothers and sisters who can influence the DNA of men and women. That’s another reason why young men and women must be guided to a balanced maturity. The seed that a young man produces shortly before he fertilizes a young woman is affected by the environment. The same applies to the egg of a young woman before she gets pregnant.