Cakir, SKence, A2020-06-252020-06-252000closedAccess0016-6723https://doi.org/10.1017/S0016672300004596https://hdl.handle.net/20.500.12587/2848M factors, which determine maleness in Musca domestica, were found on the second, third, fourth and fifth linkage groups in housefly populations of Turkey. As in European populations, the male-determining factor was more frequently located on linkage group III (M-III). Some males homozygous or double heterozygous for M factors were identified. Deviations from a 1:1 sex ratio in favour of males, as well as mosaics for somatic marker mutations and sexual mosaics (gynandromorphs), were also observed. The results reveal an extensive polymorphism in the sex-determining system.eninfo:eu-repo/semantics/closedAccessArticle761192510.1017/S00166723000045962-s2.0-003384914511006631N/AWOS:000089181400003Q3