TABLE 1

Nondisjunction in sub1794 mutants

Female genotypeRegular (X/0)Regular (XX^Y)Diplo-X (XX)Nullo-X (X^Y)% X-NDNullo-4 (4^4)% 4-NDTotal progeny
sub1794/sub1794184219335129.411434.6571
sub1794/Df(2R)PC4286125513228.86923.9577
sub1794/sub131421468221a30.64313.4673
sub1794/+716793010.130.21510
y/FM7; sub1794/sub179423826910316151.020539.61035
y/FM7; sub1794/+334234332.141.4580
sub1794/subDub23113510336a43.29429.1644
subDub/+4044114910327.214125.21119
sub1794/EP61629231900000611
  • ND, nondisjunction. Females were crossed to C(1;Y), v f B; C(4)RM, ci ey/0 males. Regular progeny received one X and fourth maternal chromosome, whereas diplo-X progeny received two maternal X chromosomes, nullo-X progeny received no maternal X chromosomes, and nullo-4 progeny received no maternal fourth chromosome. The genotypes of these progeny are indicated, with C(1;Y) abbreviated as X^Y, and C(4)RM abbreviated as 4^4.

  • a The relatively low number of nullo-X progeny was due to low transmission of the paternal X chromosome (as shown by the recovery of XX^Y progeny).