Name: ________________________
Date: ________________
Labrador Colors: Writing Rules for a polygenic trait.
GenScope File: LabradorColors.gs
Start GenScope and open the Labrador species file. (Note: You may start GenScope and then use the File: New Species menu selection to open the Labrador species file, OR simply drag and drop the Labrador file onto the GenScope application program).
Produce a new organism. In this case,
it will be a Labrador retriever dog. Alter the alleles, using the chromosome
tool, and watch the changes in the dog. Then fill out the second column
of the chart below.
| Alleles | Color | General Rule |
| EE BB | ||
| Ee BB | Black = | |
| EE Bb | ||
| Ee Bb | ||
| EE bb | Chocolate = | |
| Ee bb | ||
| ee BB | Yellow = | |
| ee Bb | ||
| ee bb |
By examining your data very carefully, try to derive general rules for color inheritance in Labradors and write them in the "General Rule" column above.
To derive a general rule, use this instance
from dragons as an example: Horns H _, where H_ can stand for HH or Hh.
Similarly, dragon color can be written as:
Now, using the data you collected from
the Labrador Retrievers, derive the rules for color in the same way that
you did for dragon color.
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