In the house fly, Musca domestica L., sex is determined by a dominant
factor, M, located on the Y chromosome.
However, there are "autosomal male"
(AM) strains in which the M factor is located on one or more of the
five autosomes (I-V) or even on X. The appearance of autosomal
males is not random. Latitudinal clines exist in Europe and the
The linkage of sex determination under two different environmental
conditions was studied in the house fly.
We compared the linkage of M in