In this week's PNAS Early Edition, a team led by investigators at Cold Spring Harbor Laboratory in New York shows that "mice harboring deletion of the chromosomal region corresponding to 16p11.2 as well as mice harboring the reciprocal duplication," show dosage-dependent changes in "gene expression, viability, brain architecture, and behavior." The team says its study shows that 16p11.2 copy-number variants provide "insight into human neurodevelopmental disorders," like autism.