Figure 4. Mutation frequency in DNA from the head, thorax, and abdomen.

Of young and old, female (A) and male (B) flies maintained at 29°C. *p<0.05; **p<0.01, ***p<1e−5 (t-test of old vs. young). Mutation frequency of old male thorax was significantly different from old male abdomen (p = 9.13e−05) and old male head (p = 0.01092). Mutation frequency of old female thorax was different only from old head p = 0.03318. Error bars are Standard Deviations.