Rg 1

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Rg 1
Ragged leaves1
By Zack Ernst
Ragged leaves1 (Rg1), ZLE, 1-13-05
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• Mutation
• The act or process of making a heritable change
  in the genetic material (DNA).
• Phenotype
• 2) The appearance of an individual. Phenotypes
  can be normal (wild-type) or mutant. A mutant
  individual can have parents that are genetic
  carriers, but show a normal phenotype.
• Mutant phenotypes are caused by a change in a
  gene or a chromosome.

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Rg1 phenotype
The mutation in the ragged1 gene causes the
leaves to have rough and ragged edges.
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Facts

• The Rg1 mutation can be lethal
• The Rg1 gene has not been cloned
• Rg1 has a dominant mode of inheritance.
• The gene is on chromosome three

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GROWTH CHART
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16 SEEDLINGS FROM Rg1 FAMILY
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SEEDLINGS DO NOT YET SHOW THE Rg1 MUTANT
PHENOTYPE
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Original Reference for the ragged leaves1
mutation Authors R.A. Brink P.H. Senn In
Journal of Heredity Volume 22 Pages
155-161 Year 1931
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Class Activity Effects of Mutations on Peanut
Gathering Eating Ability
One activity we did in class was to divide into
small groups, each getting a different mutation.
The mutant groups then had to do a series of
steps ending with finally eating the peanuts.

• The mutant groups were
• Group 1 had plastic knives taped to fingers
• Group 2 had their hands taped into fists so they
  could not use their fingers
• Group 3 had their hands taped together
• Group 4 had their arms taped to their sides

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Knife hands
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Hands taped into fists
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Hands taped together
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Arms taped to sides
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Getting the peanuts from the table.
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Class Activity Effects of Mutations on Peanut
Gathering Eating Ability

• Results
• Each group finished within five minutes.
• Each group found ways to accomplish the tasks in
  spite of their mutations.
• This meant that each group could survive with
  their mutation.

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Class Activity Effects of Mutations on Peanut
Gathering Eating Ability

• What we discovered
• How difficult it can be to live with a mutation.
• That species must learn to adapt to
  their mutations.
• That adaptation is crucial to the
  survival of the species.

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Thanks to

• Mrs. Crow
• Dr. Hank Bass
• Dr. Brian Ring
• Ms. Debbie Figueroa

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The End