In 2007, scientists compared height and DNA between more than 11,000 pairs of siblings and found that, across humans, 86% of height's variation can be explained by genetics. As traits go, this is very high; for comparison, genetics only explains about 26% of left-handedness.
2007 年，科學家將超過 11,000 對的手足身高與 DNA 進行比較。他們發現整個人類世界， 86% 的身高變化可從基因上做解釋。這個數字結果其實是相當高的；相比來說，基因只能解釋大約 26% 的左撇子成因。
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