a-b, The percent time avoiding the odour (mean and s.d.) for R55B01-Gal4
(a) or Mechanosensory Sensilla driver (b) flies expressing an inactive tetanus toxin control, or tetanus toxin. N = 22, 21, 22, and 19 experiments for R55B01-Gal4 and N = 23, 21, 21, and 21 experiments for the Mechanosensory Sensilla driver (genotypes: UAS-TntIMP;R55B01-Gal4, UAS-Tnt;R55B01-Gal4, UAS-TntIMP/piezo-Gal4;cha3-Gal80/+, UAS-Tnt/piezo-Gal4;cha3-Gal80/+). c, The percent time avoiding the odour (mean and s.d.) for heterozygous control, or homozygous nompCf00914 mutant animals. N = 22, 22, 21, and 21, respectively. d-e, The percent time avoiding the odour (mean and s.d.) for individual CO2 anosmic virtual and real flies (GR63a1,IR64aMB05283). Avoidance time is measured from a single ‘CO2 anosmic’ fly per experiment in a simulated model (d,
n = 80 experiments each), or in Drosophila (e,
n = 35, 37, 40, and 38 experiments) where single mutant flies were tested for CO2 avoidance in the context of wild-type flies.