[CheyennePress]

The concept of there being races of humans (in the modern sense of race) is a socio-cultural construct, not strongly based upon science or genetics.

I'm sorry, but this is simply incorrect.

There are very real and distinct genetic differences between the races that extend the spectrum of human variability, from skin color to hormone sensitivity to susceptibility to various toxins to predisposition to genetic diseases.

There are absolutely acientific and genetic difference between the races.

[hispanarepublicana]

There are absolutely acientific and genetic difference between the races.

This is true in theory, but in practice, the 3 scientifically classified "races" have become blended and diluted (one can even point to the black-haired Irish as an example of this) so that finding people who actually fit the 3 gentically classified "races" is a rarity, especially in America.