Student will manipulate flies, examine their external anatomy, begin a fly journal and make cultures of wild type flies.
Buy wild type cultures (this is also a
good time to buy mutant cultures). When they arrive, immediately separate them
into new vials, adding a total of 8-10 males and females in each. You should be able to make 4-6 vials from one
bought culture. Allow 12-14
days after culturing for the vials to exhibit each stage of fly development.
Students should work in groups of 2-3 for this and subsequent lessons, however each should keep their own journal. Throughout the lessons, leading questions are asked of students these should be answered. In addition, encourage students to generate a list of questions as they continue through the lessons. These, too, should be entered in their journal, perhaps starting from the last page in. Remind students to save the first two pages for a table of contents.
Impress upon students the need to keep an accurate and up-to-date journal. This will allow them to look back on what they have done before. This is a necessity when constructing crosses since they may not do anything to the flies for several days in a row. Also, all science experiments need to be documented. STUDENT INPUT ON WHAT A JOURNAL SHOULD LOOK LIKE? MAJOR GRADE?view
The University of Arizona
Department of Biochemistry and Molecular Biophysics
General Biology Program for Secondary Teachers