Drosophila melanogaster Trait Laboratory
Purpose: To observe various traits of Drosophila.
Study the dominant and recessive characteristics of fruit flies in the following chart.
Characteristics
Dominant
Recessive
Size and Shape of Wing
Long
Apterous, Vestigial , miniature,
(Normal)
dumpy
Color and Shading of Body
Gray
Black, Yellow
Eye Color
Red
White,
Eye Shape
Normal
Bar Eye, Eyeless, Lobe
Materials:
White card
Reetherization plate
Hand lens
15 flies
. Toothpick
Procedure:
1. Make a reetherization plate.
2. Obtain 5 etherized flies on a white card from either Stock
3. Examine and record their body characteristics. Eye Color Body Color Wing
Shape
4. Return flies to etherizer and obtain 5 more flies from a different stock, until a total of
15 flies have been examined.
Date
Sex
Male
Female
Body Color
Normal
Black
Yellow
Wings
Normal
Mutation
Eye Color
and Shape
Red
Mutation
Dead or
Newly
Formed
Stock B
Analysis Questions
1. Name two ways that can detect if the flies have been overetherized and are dead.
2. How long on average does it take before the etherized flies recover? __________
3. How many flies did you examine that were newly formed? ______ Dead ? ______
4. Describe the function and structure of a morgue.