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Samar Aryani's picture

Samar and Ruth-Tan Plan

We tested body color for our experiment. We decided to start off with a wildtype male and a tan female. The offspring were equally split with half tan males and half wildtype females. We then mated the offspring of the F1 generation and it resulted in an equal number of tan and wild males and females. At this point we came up with a hypothesis.

According to Mendel, there are two genes for each trait. However, it appears that males have only one gene that accounts for body color. We think that the gene for body color is carried on the "X" chromosome. Males, possessing an "X" and a "Y" get the gene from the mother, who possesses two "X" chromosomes. The females acquire one "X" from their father and one "X" from their mother, the tan is covered up by the wild. Thus, females can carry the tan trait recessively. We think that tan is an x-linked recessive trait.

To test this, we mated a tan male and wild female and hypothesized that the F1 generation would be one wild male and one heterozygous wild female. We would then be able to mate that female with a new tan male and have evenly split wild and tan offspring as in our previous trials. This proved to be the case, thus validating our hypothesis and making us the most amazing people in the world.

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