Stressful Environments Genetically Affect African American Boys (image) Princeton University, Woodrow Wilson School of Public and International Affairs Share Print E-Mail Caption African American boys growing up in disadvantaged environments have shorter telomeres -- DNA sequences related to aging -- than their advantaged peers by age 9, a Wilson School study shows. Telomeres live at the end of chromosomes, which are found in cells. They vary in lengthy by person, shrinking with age. Growing up in disadvantaged environments quicken this process for black boys, causing physiological weathering. Credit Ticiana Jardim Marini/Woodrow Wilson School Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.