Point mutation.
Ten-a[+]/Ten-a152, Ten-m628 has ommatidium phenotype
Ten-a[+]/Ten-a152, Ten-m628 has interommatidial bristle phenotype
Ten-a[+]/Ten-a152, Ten-m628 has interommatidial bristle | increased number phenotype
Ten-a152; Ten-m628 double heterozygotes show interommatidial bristle loss, supernumerary interommatidial bristles, uneven ommatidial size and shape, column disorder, and interommatidial fusions in 5-6% of adults.