<http://schema.org/alternativeHeadline>
"Understanding the core differences between chromosomes, and which traits from them survive, may help scientists develop better medical treatments of diseases."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/green-tech/research-innovations/stories/why-the-y-chromosome-and-men-arent-going-away>