Making Impossible Predictions about Sexuality A 2006 study on
fraternal birth order and homosexuality discovered that with
each male child a woman has, the chance of her next son being
gay increases. What followed was a problem neuroscientist Marc
Breedlove called “a divide between the people doing the research
and the people hearing about it.” He explains that while the
corollary exists, the statistics are nearly impossible and it is
far from the smoking gun of genetic sexual determinacy. Watch
this clip featuring NIH director Francis Collins for more on
bioethics and “engineering” babies for desired traits. More
videos from this series: The Origins of Orientation Recorded
June 2011; Posted September 2011