Jews were considered and still are considered good with their brains.
Russians are too considered good with their brain, many successful american companies being the mastermind of Russian immigrants.
Now we're talking about Indian and Chinese scientist.
Does heredity have an effect on the brain?
Itis much the case that the offspring seem to have an effect on one's brainpower, but not on everyone because even though a descend may have different brain abilities.
I think many factors affect the ability of a person's brain, not all children born from smart parents have the same ability with their parents, they can be just as smart, smarter or even less smart at all.
Smart parenting, good financial support, and a good school can produce children with good brainpower.