Figure 2.
(A) Noncompetitive male mating success of three y null mutants, y1, Df(1)y-ac22 [here abbreviated Df(1)y], and y59b. Yellow bars represent behavioral data collected from experimental (mutant) males, and black bars represent data from control males (carrying the minichromosome). Bars represent means + SEM, calculated across behavioral trials. Data were analyzed using Fisher's exact tests, and the P-values from this analysis are shown. Sample sizes and additional statistical analyses are shown in Table 2. (B) Competitive male mating success of the same y null mutants. Raw data converted to percentages of total competitions are shown. Here, mating success is measured as the percentage of time that a genotype achieves first copulation with a female when in direct mate competition with another genotype. Data were analyzed with binomial tests to determine for each mutant-and-control combination whether a significant difference from a 50:50 distribution among males existed. In all cases, we found a highly significant difference (see results).