Rg 1 Ragged leaves1 By: Zack Ernst Ragged leaves1 (Rg1), ZLE, 1-13-05
Mutation: • The act or process of making a heritable change in the genetic material (DNA). • Phenotype: • 2) The appearanceof 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.
Rg1 phenotype: The mutation in the ragged1 gene causes the leaves to have rough and ragged edges.
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
SEEDLINGS DO NOT YET SHOW THE Rg1 MUTANT PHENOTYPE
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
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
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.
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.
Thanks to – • Mrs. Crow • Dr. Hank Bass • Dr. Brian Ring • Ms. Debbie Figueroa