This deliverable captures the information necessary for the Gizmo (DCR) author
to .... LEARN: The student will learn that finding observables is a key step in any ...
Gizmo Design Specification DNA Fingerprint Analysis Filename: EL_MSLS_DNA_Print.dir Spec Author: Raman Pfaff Gizmo Author: Qiuli Sun CM Author: TBD QA Lead: TBD
Abstract: Students will be able to obtain the DNA finger print of multiple organisms that are all from the same species and show many physical similarities.
This deliverable captures the information necessary for the Gizmo (DCR) author to develop the prototype version of a Gizmo, and the Curriculum Material (CM) author to develop Exploration Guides and Progress Check Questions based on a set of Teaching Points. Once developed, the material should be reviewed against these specifications.
1.0 Gizmo Description This Gizmo will allow students to obtain DNA finger prints of an organism. The finger print will be a very limited and small print (just 20 segments), but the print will have regions that correspond to specific observable features on the organism. The user will be able to drag animals to a DNA scanner which will produce a finger print graphic. The graphic can then be dragged around to a holding area where comparison can take place by dragging a highlight region across the finger prints.
1.1 Gizmo Coding This Gizmo has a few features that will be challenging. Each animal has to have a label associated with it (A, B, C,...) and a unique appearance. The animals can be dragged around on the left side of the screen. If they are placed close to the “lab table” (shown with an animal sitting on it in the sketch) they will remain on it, otherwise they will move back to their home location. When the analyze button is pressed the DNA finger print will be produced from the device. It would be good if the animal would either lick the probe coming out of the scanner, or a needle would poke the animal. After pressing the button with an animal on it the button ghosts until the animal is removed and the print is dragged away. The print can get “printed” by the scanner Page 1 of 5
Gizmo Description
with some sort of scrolling appearance. The print consists of 20 chunks that are 5 pixels high. The total height will be 100 pixels, and the width should be 20 pixels (maybe 15). Each print must also be labelled to go along with the animal. After the print is produced it can be dragged up to the storage region (and if the animal has been changed or removed the analyze button unghosts). The three observables will be hair color, eye color, and body shape (this can be changed later). There will be two states for each observable (such as blonde hair vs. brown hair, blue eyes vs. brown eyes, and round body vs. square body). Each observable will be controlled by a sequence of three consecutive bars in the print, so a total of 9 bars of each print will be meaningful, and the other 11 will be randomly chosen. Each print must be unique. For each “group” of animals you must first choose which region holds the controlling elements for each observable. For instance, 3 slots in Region 1 could control eye color, Region 2 hair color, and Region 3 body shape. When the “New animals” button is pressed the controlling regions randomize again and the Gizmo is reset. New finger prints for the animals are developed, but the controlling slots must still accurately describe the animals, and the other 11 slots are randomly chosen. In the figure below the eye color could be slot 2, 3, and 4, the hair color could be 7, 8, and 9, and the body shape could be 18, 19, and 20. All other slots are randomly chosen (being sure that all animals have a unique random selection though). In the figure below the animals labelled A and B are both blonde haired, blue eyed, round body creatures, but the DNA patterns are unique due to the randomization of non-critical slots.
Region 3
blue
brunnette
B
brown
Region 2
A
square
Region 1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
blonde
Detailed View of DNA Print
round
FIGURE 1.
In the print storage area the prints can be rearranged, but they snap in to locations when released so that they don’t overlap. This might be a modification to the fan placement behavior that was written for the fan cart Gizmo. The prints can also be dragged from one region to another (see Figure) since students may want to have all the animals with one particular feature to be in the upper or lower region. When the “Comparison guide” checkbox is selected the draggable and resizable highlight region becomes visible. There should be one for each
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Gizmo Description
Gizmo Description
bin holding things and there should be a ruler indicator of some sort underneath it with markings clear enough so that you can easily compare settings with other students or yourself at a later time.
1.2 Gizmo Graphics There are 8 unique types of animals shown in the table below.
TABLE 1.
DIfferent Types of animals Animal
Hair
Eye
Body
1
Blonde
Blue
Round
2
Blonde
Brown
Round
3
Blonde
Blue
Square
4
Blonde
Brown
Square
5
Brown
Blue
Round
6
Brown
Brown
Round
7
Brown
Blue
Square
8
Brown
Brown
Square
One graphic will be required for each type of animal. For the animal licking the sensor it would be nice if it would just stick a tongue out so a graphic for that would be good. The other graphics involve the DNA analyzer. This can be relatively simple (even box level if we have no time). The DNA finger prints will need to be created using imaging lingo since they are random.
1.3 Textbook/WWW References http://www.pbs.org/wgbh/nova/sheppard/analyze.html Gizmo)
Gizmo Description
(excellent
and
simple
shockwave
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Gizmo Standards
1.4 Gizmo Sketch
FIGURE 2.
Gizmo Prototype Sketch Population Group
Print Storage
New group
Comparison guides
B
20 30
ruler
B C ... DNA Analysis
A ruler
Analyze D E A
2.0 Gizmo Standards This is where you can give the overall goal of the gizmo pedagogically. Correlations to various state and national standards can be placed here, along with other things.
2.1 DO/LEARN Teaching Points The student will do the following things in this Gizmo. For every action the expected outcome is shown. It should be relatively simple to develop PCQ’s from this set of tasks.
DO: Move multiple animals to the DNA analyzer and observe a DNA finger prints. Observe and compare the appearance of the prints in the storage area. LEARN: The student will learn how to record DNA prints. The student will learn that DNA prints are unique.
DO: Compare DNA prints of all blonde haired animals. LEARN: The student will learn that certain traits can be found in DNA prints in specific locations.
DO: Compare DNA prints of all brown eyed animals.
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Gizmo Standards
Gizmo Standards
LEARN: The student will learn that certain traits can be found in DNA prints in specific locations.
DO: Try to find another observable associated with the animal (body type) and isolate where in the DNA chain the controlling slots are located. LEARN: The student will learn that finding observables is a key step in any problem, and through analysis a pattern can be found.
2.2 Standards Correlations The national and state standards will be listed here for the national plus eight key states. Virginia LS.13.
2.3 Key Words The key words are shown below. These are the words that users may enter for search terms, or other things.
Gizmo Standards
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