Table 1.

Effects of tna mutations on Scr homeotic derepression phenotypes induced by Polycomb and Scr mutations

GenotypeTransformed flies/total* (%)Expressivity (%)
+/Pc437/40 (93)14
tna1/Pc4 8/20 (40)4
+/Pc320/20 (100)52
tna1/Pc3 16/20 (80)6
tna2/Pc3 20/20 (100)28
tna3/Pc3 20/20 (100)30
tna4/Pc3 19/20 (100)17
tna-/Pc310/20 (50)2
+/ScrMsc20/20 (100)23
tna1/ScrMsc 18/20 (90)8
tna2/ScrMsc 19/20 (95)7
tna3/ScrMsc 16/17 (94)9
tna4/ScrMsc 19/20 (95)6
tna-/ScrMsc 0/20 (0)0
  • * Numbers of male individuals showing sex comb teeth in the second and/or third leg.

  • Expressivity was determined by counting the number of ectopic sex comb teeth on the second and third legs and comparing to control first legs with an average of 10.8 sex comb teeth each (100%).

  • tna- is Df(3L)vin2, a chromosomal deficiency for 67F2 to 68D6 that deletes the entire tna gene.