<i>sim-bam-yfp</i> rescues <i>D</i>. <i>melanogaster bam</i> mutant male sterility.

<p>(A) <i>mel-bam-yfp</i> and <i>sim-bam-yfp</i> both rescue male sterility under standard fertility conditions. One male and two tester females were allowed to mate and the trio was transferred to a new vial every five days. No comparisons are significantly different. N ranged between 42 and 46 males at start of experiment; due to mortality N ranged between 37 and 43 at end of experiment. (B) <i>sim-bam-yfp</i> but not <i>mel-bam-yfp</i> rescues male sterility under sperm exhaustion conditions. One male was allowed to mate with a new pair of virgin tester females everyday for five days. Male fertility is the average number of progeny per male +/- SEM for each vial. N ranged between 28 and 33 males at start of experiment; due to mortality N ranged between 22 and 28 at end of experiment. Transgenes are inserted in attP40. (<i>t</i>-test, *<i>P</i><0.05, **<i>P</i><0.01, ***<i>P</i><0.001).