TABLE 2

Segregation data of the sex and the fourth chromosomes in C(1;Y)6/Dp223 males

Sperm classes
X̂YDp(Dp)X̂Y?
Dp(Dp)
O% ND
Second or third
chromosome genotype
Na4(4)O4(4)O4(4)O4(4)OTotalMinutebSex
chromosome
Fourth
chromosome
+/+5593711728140180268910030.80.1
mei(2)yh92/mei(2)yh9273118710812841151276416473290128318.118.3
mei(2)yh92/CyO42138181449670161286814060.81.1
mei(3)M19/mei(3)M19251774627868993329147103919145.245.9
mei(3)M19/TM31466017281404013984330.60.3
mei(3)M20/mei(3)M20333791104771031765644783183141641.647.6
mei(3)M19/mei(3)M20873227418421372193334243.855.2
mei(2)yoh7134/mei(2)yoh71342649722733262073913629226.28.7
mei(2)yoh7134/+1343305661014010056560.50.4
mei(2)yh149/mei(2)yh149476181199391037020323592.32.4
mei(2)yh149/+1560408520005014616130.30.0
mei(2)yh217/mei(2)yh21757790518116120106227325464.41.0
mei(2)yh217/CyO21988199934016020113211.00.4
mei(2)yh15/mei(2)yh155914391423742611605392015881.72.4
mei(2)yh15/CyO268302133816022021997221.30.3
mei(2)yh137/mei(2)yh1377816993732495120380507623970.83.5
mei(2)yh137/CyO22510079523015013255501.40.3
  • C(1;Y)6, y2 sc cv v f/Dp(1;f)YP223, y+; spa+/spa+ males were single-pair mated to y/y; C(4)RM, spapol/O females. X̂Y denotes the compound-XY chromosome C(1;Y)6. CyO and TM3 are balancers. Data presented are based on the number of Minute+ progeny (see materials and methods). The possible presence of multiple doses of the indicated chromosomes that cannot be distinguished phenotypically is shown in parentheses in the sperm genotypes. ND, nondisjunction.

  • a Number of single-pair matings performed.

  • b All haplo-4 Minutes were listed here without classification and were excluded from further analysis and from the calculation of nondisjunction frequencies.