雄果蝇可通过展翅和振翅而演奏出求偶歌曲。这种歌曲的某些参数例如声音脉冲间隔的长度具有物种特异性,雌果蝇只能识别与其相同物种的求偶歌曲。可影响雄果蝇求偶歌曲节律的基因座存于X染色体的时钟(per)基因。最近,美国勃兰台斯大学生物系的惠勒等通过实验表明,若将per基因座的片段从这种雄果蝇转移到另一种雄果蝇,则受体雄果蝇便可改变其求偶歌曲 Male flies play courtship songs by spreading wings and wings. Certain parameters of such songs, such as the length of the sound pulse interval, are species-specific and the female flies recognize only the courtesy song of the same species as the song. Gene loci, which affect the rhythm of mating song of male flies, are stored on the X chromosome’s per-gene. Recently, Wheeler et al. From the Department of Biology, Brandense University, USA, experimentally demonstrated that if the per locus is transferred from this male fruit fly to another male fruit fly, the recipient fruit fly can alter Courtship song