题目

A butterfly’s wings can have many jobs besides keeping the insect high up in the air. They may be used to attract mates, or to warn potential attackers to stay away. All of these roles, though, depend on their unchanging colouration. This plays into the idea that butterfly wings are dead tissue, like a bird’s feathers. In fact, that’s not true. For example, in some species males’ wings have special cells releasing some chemicals which attract females.Nanfang Yu, a physicist at Columbia University, in New York, has been looking into the matter. Together with Naomi Pierce, a butterfly sp（09嘉兴一中二月）下图表示果蝇某一条染色体上的几个基因，错误的叙述是      A．基因在染色体上呈线性排列               B．基因是有遗传效应的DNA片段C．朱红眼基因和深红眼基因是一对等位基因   D．基因决定果蝇的性状