svr^poi mutant flies recover more quickly from cold-induced sleep than control flies.

When tested for their response to ethanol, svr^poi mutants show a tendency for greater sensitivity than wild-type controls, although the differences are not statistically significant

svr^poi mutant males exhibit normal naive courtship behaviour when paired with virgin females.

svr^poi mutant males exhibit normal naive courtship behaviour when paired with virgin females. The failure of svr^poi mutants to suppress courtship with previously mated females indicates deficits in long-term memory.

Mutants have pointed wings and are generally smaller than normal. The proximal segments of the third and fourth longitudinal wing veins are shorter than normal, while the distal segments of these veins are longer than normal. The anterior and posterior crossveins are shorter than normal in the mutant wings. The distal and proximal segments of longitudinal veins 1 and 2 are shorter than normal. The middle segment of longitudinal vein 5 is shorter than normal. The wing edge between the second and third longitudinal wing veins is longer than normal, while the wing edge between the third and fourth veins and the wing edge between the fifth longitudinal vein and the alula is shorter than normal.

There is no substantial effect of the lighting conditions on mating ability of svr^poi males; svr^poi males introduced to virgin females for several days result in the same number of offspring as control males introduced to virgin females whether under conditions of constant bright light, constant dark or regular ambient light.

RK2. Body colour: pale.

Wings pointed. svr^poi reported to suppress s and sp.

a^Bay, svr^poi has wing phenotype

a^ba, svr^poi has wing phenotype