... and white eyes which is an X-linked trait. X-linked meaning the alleles only occur on the X chromosome that means that since males only have one X they can never be heterozygous. That is why recessive X-linked traits are expressed much more often in males than females. The purpose of this experiment is to cross certain genotypes and observe what is produced in the next generation so that we can determine the ratio for the phenotypes that are expressed. Methods Vial # 1: The P generation or Parent generation was vg/vg +/+ X +/+ eb/eb. This was crossed to create the F1 generation that is totally heterozygous. These were the ones that were bought for this experiment. P generation- vg/vg +/+ X +/+ eb/eb F1 generation- +/vg +/eb X +/vg +/eb F2 generation- ? Week 1: Medium is placed in the bottom of a clean vial. Then 5 flies are placed in ...

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