A new study into the genetics of same-sex attraction reveals how complex it is. (Credit: EpicStockMedia/Shutterstock)

In the largest study of its kind yet, researchers find no single gene influences whether a person engages in same-sex sexual behavior. Instead, like height, variations in many genes throughout the human genome contribute to sexual preference, researchers report Thursday in the journal Science. The work reiterates that there is a biological component to having a same-sex partn