Their next step is to identify the gene (or genes) responsible for the differences in color and mate preference.
他们下一步是要破解导致颜色与配偶偏好不同的基因。
A shift in wing color and mate preference.
是蝴蝶翼的颜色与求偶偏好的变化。
For instance, in Costa Rica, the two most closely related species are white or yellow, which prefer to mate with those of their own color.
举例来说，在哥斯达黎加，两种亲缘关系最近的蛱蝶翅膀颜色是白色或者黄色，它们会根据颜色的不同“物以类聚”，进行配对。
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