Replication of mtDNA is severely impaired in larpmtr-null mutant ovaries.
Homozygotes have shorter and thinner bristles than normal and some bristles are occasionally missing. The mutant flies also have a slight rough eye phenotype.
71% of larpS003108/larpmtr-null females are sterile.
45% of larpS022529/larpmtr-null females are sterile.
6% of larp06487/larpmtr-null females are sterile.
Homozygous females do not lay eggs.
Eggs laid by larpS003108/larpmtr-null females show a number of defects during syncytial divisions, including chains of linked spindles, free centrosomes, multipolar spindles, chromosome segregation defects and a loss of synchrony throughout the syncytial divisions.
Eggs laid by larpS022529/larpmtr-null females show a number of defects during syncytial divisions, including chains of linked spindles and free centrosomes. Time-lapse imaging shows that centrosomes can be seen to successfully duplicate following the previous division cycle, however the movement of the centrosomes around the nuclear membrane is hindered. Nonetheless, a spindle forms between the two groups of centrosomes. Nuclear spacing is also disrupted.
48.4% of homozygous spermatocytes show defects in meiosis.