Contains an internally deleted P-element with breakpoints 852bp from the 5' terminus and 41bp from the 3' terminus.
Body colour: flies have reduced pigmentation in the body cuticle and wing blade and wild-type pigmentation in the thoracic, leg, wing and abdominal bristles.
y2s42 has abnormal body color phenotype, enhanceable by ph-pP1
y2s42 has leg sensillum phenotype, enhanceable by ph-pP1
In the presence of ph-pP1, pigmentation in the thoracic and leg bristles is reduced.