Back Story | a brain is a brain is a brain

摘要

The uniformity of gene activity in the brain is striking when seen in the context of overall human genetic diversity. Each dot on the graph at right represents a comparison between two people. On the horizontal axis is the total genetic difference between a pair. On the vertical axis is a measure of the difference in gene activity between the two in the brain's prefrontal cortex. The horizontal axis clearly reflects continent-level differences in ancestry - comparing an African-American's DNA with a Caucasian's (green dots) produces the biggest difference, while comparing DNA from a Caucasian with another Caucasian (yellow dots), or an African-American with an African-American (blue dots), produces less difference.