试题要求：
Some scientists believe that handedness is decided by genes.
试题解析：
答案：A
解析：
原文： One theory is that handedness (hand preference) could be a result of genetics.
有一种理论说这可能是由于基因造成的，题干的表述与文章相符，选A。
考点：阅读判断,2016.4
Some scientists believe that handedness is decided by genes.
原文： One theory is that handedness (hand preference) could be a result of genetics.
有一种理论说这可能是由于基因造成的，题干的表述与文章相符，选A。