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ward
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science
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The F1 has TWO possible gametes, wild (+) or vestigial (vg). Therefore, the F2 would look like this in a
diagram:
+
+ + + vg
vg
+
vg + vg vg vg
For every F2 fly with the vestigial characteristic, there will be three flies with the wild characteristic
(one homozygous for wild and two heterozygous for wild).
As an additional experiment, you could try crossing F1 generation virgin females with pure wild or
vestigial strains and try to predict the results.
A brief survey of methods for working with Drosophila is all that has been possible within the scope of
this leaflet. The reader is urged to take advantage of some of the fine works available which deal with
Drosophila and genetics in general for more detailed information.
© 2021 Ward' s Science. All rights reserved. Rev. 2021
