Ptc Genetics Lab Student Worksheet Page 7
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10PTC
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Part II: Results
What does your gel look like? Record images of the gel.
Part III: Analyze Your Data
1. How many DNA bands do you see in Jillian’s sample? Jillian is a non-taster, how many different PTC alleles does Jillian
have?
2. How many bands of DNA do you see in Jillian’s mom and dad samples? Jillian’s mom & dad are tasters, how many
different PTC alleles do they have?
3. Based on the DNA pattern on the gel and the genetics of the PTC genes that you have learned, can you determine which
DNA band corresponds to the normal PTC allele and which one corresponds to the mutant PTC allele?
4. What is the genotype for Jillian, her mom and dad?
5. Can you determine which PTC gene Jillian got from her mom and dad?
6. Compare Jillian’s Mom’s and Dad’s PTC genes to Jillian’s. Based on the data, is your hypothesis supported or refuted as
to why Jillian is not a PTC taster and Jillian’s parents are PTC tasters? Draw a Punnett square to explain your results.
Father
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