Drosophila can have 1, 2, or 3 stripes on their body. From previous experiments, you suspect that there are genes (Gene C and Gene D) that control the number of stripes. A recent published paper described a similar stripe pattern in bees. Furthermore, in bees, Gene C is recessively epistatic to Gene D, are on different chromosomes, and the order of function is the following: C 3 stripes 2 stripes → 1 stripe You therefore set out to test the hypothesis that Gene Cis also recessively epistatic to Gene D in Drosophila. To do so, you begin by crossing pure breeding 1-striped drosophila with pure breeding 3-stripped drosophila. To statically test your hypothesis, you proceed to perform a chi-square analysis on data obtained from the F1 X F1 cross. Using your hypothesis as your basis to analyze the results, fill the table below.

Human Anatomy & Physiology (11th Edition)
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Author:Elaine N. Marieb, Katja N. Hoehn
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Drosophila can have 1, 2, or 3 stripes on their body. From previous experiments, you suspect that there are
2 genes (Gene C and Gene D) that control the number of stripes. A recent published paper described a
similar stripe pattern in bees. Furthermore, in bees, Gene C is recessively epistatic to Gene D, are on
different chromosomes, and the order of function is the following:
C
D
3 stripes
→ 2 stripes
1 stripe
You therefore set out to test the hypothesis that Gene Cis also recessively epistatic to Gene D in Drosophila.
To do so, you begin by crossing pure breeding 1-striped drosophila with pure breeding 3-stripped
drosophila.
To statically test your hypothesis, you proceed to perform a chi-square analysis on data obtained from the
F1 X F1 cross. Using your hypothesis as your basis to analyze the results, fill the table below.
Note: You do not have to calculate the chi-square or make a conclusion. Just fill the table.
Observed
Еxpected
Нуpothesized
Phenotypic ratio
Phenotypes
F2
numbers
1 stripe
15
2 stripes
29
3 stripes
136
Transcribed Image Text:Drosophila can have 1, 2, or 3 stripes on their body. From previous experiments, you suspect that there are 2 genes (Gene C and Gene D) that control the number of stripes. A recent published paper described a similar stripe pattern in bees. Furthermore, in bees, Gene C is recessively epistatic to Gene D, are on different chromosomes, and the order of function is the following: C D 3 stripes → 2 stripes 1 stripe You therefore set out to test the hypothesis that Gene Cis also recessively epistatic to Gene D in Drosophila. To do so, you begin by crossing pure breeding 1-striped drosophila with pure breeding 3-stripped drosophila. To statically test your hypothesis, you proceed to perform a chi-square analysis on data obtained from the F1 X F1 cross. Using your hypothesis as your basis to analyze the results, fill the table below. Note: You do not have to calculate the chi-square or make a conclusion. Just fill the table. Observed Еxpected Нуpothesized Phenotypic ratio Phenotypes F2 numbers 1 stripe 15 2 stripes 29 3 stripes 136
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