On what I.Q. depends?
From many components: heredities (that at intellectually developed parents an every prospect to give birth to the child prodigy, at a science any more does not cause doubts), level of the income and a family social status (the it above, the is more than possibilities for mind development). Besides, huge value has a field in which there lives the person.
It includes all: a family, the country, an epoch. (Take the same Renaissance, presented to the world of ingenious artists.) quite often simple rural child, getting in vysokointellektualnuju a family, catches (and is charged) by its values. An example from a life: the little girl was taken away from parents-alcoholics by teachers of university — sisters of the father. Today it has a scientific degree and itself teaches in high school. But there are the cases which are not keeping within in any frameworks and laws. Speech about Lomonosov. The field surrounding it in far rural remote places, designated to it career of the fisherman, but it without assistance has come from village to a city and became great scientists! The resume: the person — the author of the life. It can influence the abilities and raise IQ even if by right of succession has not received genes of outstanding intelligence.