058 CULTURE OF FRUIT FLY (Drosophila melanogaster) FOR GENETIC STUDIES

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The males are smaller than the females and shapes
of the abdomens differ. The abdomen of the male
is smaller, more rounded with a black tip. The
abdomen of the female is larger, more pointed and
has 4 or 5 black transverse rings.
Male
Female
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Attract fruit flies by putting over-ripe fruit in
an open container, e.g. a glass jar. After
trapping the fruit flies, transfer them to small
containers containing fruit chunks, preferably
over-ripe banana. Put a slice of ripe fruit in
the bottom of the container and make a paper
funnel with a hole in the end to fit the mouth of
the container. Place the container in the open.
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When six or eight fruit flies have entered
(including both males and females) remove the
funnel and plug it loosely with cotton wool.
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Soon eggs will be deposited, and in 2 or 3 days
the larvae will hatch. Put a piece of paper in
the container for the larvae to crawl on when
they are ready to pupate. Insects emerge from the
pupae. Put newly-hatched fruit flies in another
container to start a new generation.