ICE\#6 Transposable Elements (T.E.s) can disrupt genes and affect an organisms' phenotype
Student name: Section: 1.0 points Fruit flies naturally have red eyes when their white gene,
found on the X chromosome, is wild-type, X w + . One mutation in the white gene causes their
eyes to lose color and appear white eyes, X w . The eye color phenotype in flies can be affected
by the insertion of a foreign piece of DNA called a Transposable Element (T.E.) in the white
gene. A T.E. called copia is one that can insert into the white gene and cause the eye color to
change from ( X v + . 1. (0.4 pts) Solve the Punnett Square. Remember that X Y is male and XX
is female. Then, think about the eye color of each gender. a) Provide the genotypic ratio: b)
Provide the phenotypic ratio: 2. (0.2 pts) Transposable elements can be removed from one region
of DNA using an enzyme called a and insert into another region of DNA using this same DNA
cutting and ligating enzyme. 3. (0.4 pts) After the enzyme in question \#2 removes the copia
T.E., the white gene will be restored to wild-type. Use this new genotype to solve the cross (on
back). a) Provide the genotypic ratio: b) Provide the phenotypic ratio:.
ICE-#6 Transposable Elements (T-E-s) can disrupt genes and affect an o.pdf
1. ICE#6 Transposable Elements (T.E.s) can disrupt genes and affect an organisms' phenotype
Student name: Section: 1.0 points Fruit flies naturally have red eyes when their white gene,
found on the X chromosome, is wild-type, X w + . One mutation in the white gene causes their
eyes to lose color and appear white eyes, X w . The eye color phenotype in flies can be affected
by the insertion of a foreign piece of DNA called a Transposable Element (T.E.) in the white
gene. A T.E. called copia is one that can insert into the white gene and cause the eye color to
change from ( X v + . 1. (0.4 pts) Solve the Punnett Square. Remember that X Y is male and XX
is female. Then, think about the eye color of each gender. a) Provide the genotypic ratio: b)
Provide the phenotypic ratio: 2. (0.2 pts) Transposable elements can be removed from one region
of DNA using an enzyme called a and insert into another region of DNA using this same DNA
cutting and ligating enzyme. 3. (0.4 pts) After the enzyme in question #2 removes the copia
T.E., the white gene will be restored to wild-type. Use this new genotype to solve the cross (on
back). a) Provide the genotypic ratio: b) Provide the phenotypic ratio:
