Do you think that differences in intelligence and personality have genetic or environmental cauces

Referring to the subject above i think differences in intelligence and personality have genetic and environmental causes.
As far as i have read lots of text books like genetics books a child inherits a high percentage of genes from her/his parents. I mean parents pass on genes to their children. Therefore if dad and mum are intelligent enough the children will be intelligent also.The baby inside her mum's womb develops and during this time doctors and nurses give advice to mums not to eat certain foods or to do dangerous things which can harm the baby. During this time mother should avoid drinking alcohol and dangerous food and dangerous things as it can cause brain damage and lots of problems.Therefore in this case it can affect children's intelligence.
About environmental causes,in this case some children are affected by the environment like if they don't have a good dad and mum ,they are poor, they have bad friends, if they behave well and other things which can cause poor attendance and difficulty in their studies.
I conclude that differences in intelligence and personality have genetic and environmental causes.