It's interesting to visualize what % heritable actually means. Here is a graph from a recent study trying to predict height from human genes. They found a corre

It's interesting to visualize what % heritable actually means. Here is a graph from a recent study trying to predict height from human genes. They found a correlation of 0.64 https://2.bp.blogspot.com/-4qSTryry0so/WcAhygytvTI/AAAAAAAAS1E/LVDdmbClw18BikVNOCKHGthr4tJSm-YgwCLcBGAs/s1600/image%2B%25281%2529.png https://2.bp.blogspot.com/-4qSTryry0so/WcAhygytvTI/AAAAAAAAS... That means, in practice, your height outcome tends strongly toward a fairly narrow range around the predicted mean. I found it illuminating to visualize the pattern. (The full article is http://infoproc.blogspot.ca/2017/09/accurate-genomic-prediction-of-human.html http://infoproc.blogspot.ca/2017/09/accurate-genomic-predict...)