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Kendra and Ashley

In this lab, we had to conduct the same experiments as Mendel, but using a computer program. We had to find a gene that didn't prove the 3:1 ratio correct. When we tried to cross a brown eyed/wild type female with a wild type male, we found that the brown eyed trait was recessive because in F1, both the female and the male were wild type but in F2, the offspring still showed a 3:1 ratio, which means that this trial did not prove Mendel's experiment wrong.

So then we decided to try out the body color of the fruit flies. We made the female a yellow/wild type and left the male as just wild type. In F1, we found that it was a 50/50 split between the wild typed bodies and the yellow wild typed bodies, only this time the males were yellow bodied. Then, in F2, we found that some of the offspring came out wild type and some came out yellow typed but more of the offspring were yellow typed. From this we concluded that the yellow bodied/ wild type was dominant over the wild typed body. We also found that yellow bodied/wild typed flies breeded true, which means that the yellow body was dominant over the wild type.

So, we think that the genotype is yellow bodied, since the parents were both wild typed but just the female was yellow bodied. Because all of the offspring were overall wild typed and the most were yellow bodied, we think that yellow body must be the dominant genotype.