一项研究将 TUBB4B 基因与左撇子联系起来，这种现象使 2.7 倍的左撇子人口成为左撇子。 A study links a gene, TUBB4B, to left-handedness in 2.7 times more left-handed individuals.

10% 的人是左撇子，包括 Lady Gaga、巴拉克·奥巴马和比尔·盖茨等名人。 10% of people are left-handed, including celebrities like Lady Gaga, Barack Obama, and Bill Gates. 一项新研究发现，左利手人群中存在 TUBB4B 基因的罕见变异，其数量是右利手人群的 2.7 倍。 A new study identifies rare variants of a gene, TUBB4B, in 2.7 times more left-handed people than in right-handed ones. 该基因参与控制细胞的形状，并可能在导致优势手决定的大脑不对称性的发展中发挥作用。 This gene is involved in controlling the shape of cells and may play a role in the development of brain asymmetry that underlies dominant hand determination.