Figure 7.—

Germline crossovers in wild-type and mus309 mutant males. Bars show the mean percentage of progeny that were recombinant between st and e, with lines indicating standard error of the mean. Males either were untreated or were exposed to the indicated dose of gamma radiation during larval development. Crossover rates between different mutant genotypes were not significantly different, but at each dose each mutant genotype was significantly different from the wild type (P < 0.0001 for each comparison). See supplemental Table S7 at http://www.genetics.org/supplemental/ for numbers of vials, progeny, and crossovers.