Table III.

Tetrad analyses

Parental ditypeNonparental
 ditypeTetratype
Expected114
Δmdm31 × Δmmm10.92 (n = 4)0.92 (n = 4)4.16 (n = 18)
Δmdm32 × Δmmm11.37 (n = 8)0.69 (n = 4)3.94 (n = 23)
Δmdm31 × Δmmm20.9 (n = 9)1.5 (n = 15)3.6 (n = 36)
Δmdm32 × Δmmm20.86 (n = 5)0.34 (n = 2)4.78 (n = 28)
Δmdm31 × Δmdm101.24 (n = 6)1.03 (n = 5)3.72 (n = 18)
Δmdm32 × Δmdm100.5 (n = 3)1.33 (n = 8)4.17 (n = 25)
Δmdm31 × Δmdm120.77 (n = 4)0.58 (n = 3)4.65 (n = 24)
Δmdm32 × Δmdm120.6 (n = 3)1.2 (n = 6)4.2 (n = 21)
  • Parental ditype, two wild-type spores and two non-viable double mutant spores; nonparental ditype, four single mutant spores (two of each type), all four spores viable; tetratype, one wild-type spore, two single mutant spores (one of each type), and one non-viable double mutant spore. The ratios of the observed classes and the total number of tetrads for each class are indicated.