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Ragged leaves1 (Rg1), ZLE, 1-13-05
By: Zack Ernst
Mutation:
1) 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.
Rg1 phenotype:
The mutation in the
ragged1 gene
causes the leaves
to have rough and
ragged edges.
1) The Rg1 mutation can be
lethal
2) The Rg1 gene has not
been cloned
3) Rg1 has a dominant
mode of inheritance.
4) The gene is on
chromosome three
GROWTH CHART
Height
in mm
Average
Height
Average
Leaf Width
9/10/04
35, 80, 80, 78, 74, 35,
50, 88, 40, 43, 0, 0,
49, 70, 52, 68
60
11
9/24/04
290, 274, 370, 330,
349, 299, 343, 299,
186, 222, 0, 0, 294,
313, 239, 329
295
12
10/1/04
474, 383, 563, 495,
397, 425, 399, 443,
226, 281, 0, 0, 491,
345, 399, 450
361
14
Date
16 SEEDLINGS FROM
Rg1 FAMILY
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
Knife hands
Hands taped into fists
Hands taped together
Arms taped to sides
Getting the peanuts from the table.
Class Activity:
Effects of Mutations on
Peanut Gathering & Eating Ability
Results:
1. Each group finished within five
minutes.
2. Each group found ways to
accomplish the tasks in spite of
their mutations.
3. 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
The End