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Wild Fruit Flies Lab Report

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Wild Fruit Flies Bred With Scarlet Fruit Flies
Introduction:
Drosophila melanogaster is the scientific name for fruit flies. The flies are widely used today for genetics, physiology, and life history evolution. Since it is easy to care for, has 4 pairs of chromosomes, breeds quickly, and lays many eggs, the fruity fly is used for numerous studies. In this lab, fruit flies are to be examined to study heredity. With each new generation, probability, protein synthesis, and the principles of DNA, are all able to be seen within this experiment. For this lab, wild fruit flies will be bred with scarlet fruit flies. The trait to be examined in this lab is the eye color. Wild fruit fly's’ eye color (red) is a dominant trait. The scarlet fruit flies have scarlet eyes, and it is a recessive trait. Fruit flies are very small, but their eyes are complex. They have compound eyes. One eye contains hundreds of light-sensing units called ommatidia. Each ommatidia has a lens and a set of light-receptor …show more content…
First, take a wand and dip it into the Lull-A-Fly solution. Then, place the vial on its side, and gently knock the flies to the bottom of the vial. Third, insert the wand into the vial without getting any of the solution on the foam stopper. Once the flies are knocked-out, take the wand out. The second method is using the Alka- Seltzer tablets. First, fill the tube ¼ full with cold water. Next, lay the vial on its side, and knock the flies to the bottom. Then, insert about ¼ of an Alka- Seltzer tablet into the tube. Quickly, put the topper (with tubing) into the tube, and put the pipet tip between the wall of the vial and the foam stopper.
Identifying Sex- Place some knocked-out flies onto a notecard. Then, examine the flies. Females are longer than males, and females don’t have sex combs. Males have more stripes on their back compared to females, and males have a round back end. Females have a pointed back

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