In a vial of drosophila, a research student noticed several female flies (but no male flies) with "bag" wings each consisting of a large, liquid-filled blister instead of the usual smooth wing blade. when bag-winged females were crossed with wild- type males, 1/3 of the progeny were bag-winged females, 1/3 were normal- winged females, and 1/3 were normal- winged males. explain these results.

one centimetre is equal to 0.01 metres

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

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