Insertion of P-element.
Unstable mutation. Homozygotes have reduced viability and thin bristles. Has no effect on the y+ phenotype.
head and thorax bristles yellow; microchaetae yellow; thin bristles; female sterile; reduced viability.
e(y)31, y2 has microchaeta phenotype
e(y)31, y2 has adult head bristle phenotype