Body colour: flies carrying yTDH-2097 (in a y- background) have a pigmentation score of 2-3 in the wing and 5 in the body (where 1 = absence of y expression and 5 = wild type). Body colour: yTDH-2097/y1#8 flies have a pigmentation score of 5 in the wing and 5 in the body. Body colour: yTDH-2097/y59b flies have a pigmentation score of 5 in the wing and 5 in the body. Body colour: yTDH-2097/y2 flies have a pigmentation score of 4 in the wing and 5 in the body. Body colour: yTDH-2097/y2sA3 flies have a pigmentation score of 4-5 in the wing and 5 in the body.