C(1;Y)6/Dp(1;f)YP223 males that are homozygous for mei(3)M191 show a high frequency of non-disjunction of the sex chromosomes (45.2%) and fourth chromosomes (45.9%).
mei(3)M191, mei(3)M201 has abnormal meiotic cell cycle | male phenotype
C(1;Y)6/Dp(1;f)YP223 males that are also mei(3)M191/mei(3)M201 show a high frequency of non-disjunction of the sex chromosomes (43.8%) and fourth chromosomes (55.2%).
"mei(3)M191" and "mei(3)M201" were recovered from the same Ishigaki natural population and most probably represent two independent isolates of the same mutation.