For many years, humans have suggested a correlation between physical characteristics such as skin and hair color, with complex human traits, such as intelligence. This video refers to this as concordance and argues that if race is more than skin deep, then such visual traits must correspond to other human genetics.  This idea of concordance resulted in expectations by student subjects in the study shown.

What were their expectations and what did the study results show?
Why do you think this was so? 
How does this relate to the American perception that race is biological? 
What did these students learn about genetic variation within the so-called races compared to the genetic variations between the so-called races?

answer this 4 question