To confirm the observation of Kathleen Clark (FBrf0208113) that stk and Alh appear to be the same gene, we tested different stk and Alh alleles from the ones she tested. stk3 (FBal0016193) x AlhRV95 (FBal0122328) produced 0/182 stk3/AlhRV95 adults stk3 (FBal0016193) x AlhEY13606 (FBal0162813) produced 0/197 stk3/AlhEY13606 adults