Just because it is genetic (in this case they probably mean heritable and supported by twin studies) doesn't mean you can find the genes that cause it. RE: why

Just because it is genetic (in this case they probably mean heritable and supported by twin studies) doesn't mean you can find the genes that cause it. RE: why we know that intelligence has genetic components but you will be laughed out of the room if you claim to have a genetics based IQ test.