黑腹果蝇对方向不对称性选择缺乏反应。

J Hered. 1987 Mar-Apr;78(2):119. doi: 10.1093/oxfordjournals.jhered.a110329.

Thirty generations of selection for directional asymmetry of eye size was practiced on a stock of D. melanogaster homozygous for the mutant eyeless-recessive. There was no obvious response, supporting previous findings that it is difficult to select for right- and left-handed expression of traits in Drosophila.

在一个纯合突变体无眼-隐性的黑腹果蝇品系上，进行了30代眼睛大小定向不对称的选择。没有明显的反应，这支持了之前的研究结果，即在果蝇中很难选择性状的右手性和左手性表达。