Body colour: flies carrying yTDH-2491 (in a y- background) have a pigmentation score of 5 in the both the wing and body (where 1 = absence of y expression and 5 = wild type). Body colour: yTDH-2491/y1#8 flies have a pigmentation score of 5 in the both the wing and body. Body colour: yTDH-2491/y59b flies have a pigmentation score of 5 in the both the wing and body. Body colour: yTDH-2491/y2 flies have a pigmentation score of 5 in the both the wing and body.