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. 2014 Jan 29;196(4):1007–1016. doi: 10.1534/genetics.113.160556

Table 3. 4th chromosome nondisjunction in males.

Paternal genotype Wild type WT+B
Normal
4 737 964
4th nondisjunction
44 0 1
0 0 3
Adjusted total 737 968
% diplo-4 0.0 0.1
% nullo-4 0.0 0.3
Total % 4th NDJ 0.0 0.4

Male WT+B flies were crossed to females bearing an attached 4th chromosome. Their progeny displayed 0.4% 4th nondisjunction, compared to 0.0% in wild type.