Tandem duplication of the P{lacW} element, such that two copies of the P{lacW} element are present in the first intron.
female sterile | recessive
mei-P26fs1
mei-P26fs2
mei-P26fs3
mei-P26fs4
mei-P26fs6
mei-P261
Reduced fertility in combination with mei-P261, fails to complement the mei-P261 nondisjunction phenotype.