Human Genetics and the Fruit Fly Drosophila Melanogaster.

High school kids learn about fruit fly ethology in this cool lab that determines fruit fly movement and behavior under different conditions.
Write an online lab report.


The first virtual fruit fly lab road-tested was the Virtual Genetics Lab II.


(heterzygous males and females)
If the test cross follows Mendelian genetics, then the cross between an F1 female and a double mutant male will result in a 9:3:3:1 ratio because it will be crossing a heterozygous (AaPp) female with a homozygous recessive (aapp) male.
The next cross was an F1 female and a double mutant male (purple eyes, apterous).
Male wild type: 321
Female wild type: 285
Male x2 mutant: 282
Female x2 mutant: 314
Male apterous: 3
Female apterous: 4
Male purple eyes: 2
Female purple eyes: 1
New Hypothesis
] 606
] 596
] 7
X 100 = .82%
If the genes follow Mendelian genetics and if the star eyed gene is dominant to the wild type gene, then the cross between the Star-eyed female parent and the Wild-type male parent will produce Star-eyed flies and wild type flies in a 3:1 ratio

The last cross was a F1 female and a double mutant male (used in the parent generation).
After completing the Drosophila lab, we concluded that the star-eyed trait is dominant to wild type flies by doing multiple crosses.

AP Biology Genetics of Drosophila Lab Report | …

Drosophila melanogaster can lay hundreds of eggs after just one mating, and have a generation time of two weeks at 21°C(Genetics: Drosophila Crosses 9)....

Mendelian Genetics with Drosophila: Lab Essay - Odinity

In general, laboratory stocks of Drosophila have been inbred for so many generations that there is no longer any significant genetic variation within any particular stock. Sibling matings, as illustrated in (B) above, completely eliminate the uncertainty in the genetic heritage of any particular individual fly. A stock of flies with red eyes "breeds true," with every individual having red eyes; a stock with brown eyes breeds true, and so does a stock with white eyes.

AP Biology Lab 7: Genetics of Drosophila - YouTube

In 1906, Thomas Hunt Morgan began work with a small fly, Drosophila melanogaster, that meets this criterion. This fruit fly, as it is called, eats yeast that colonize fallen fruits. It was relatively easy to establish a laboratory population of fruit flies, growing them in half-pint milk bottles on a food of mashed bananas and yeast. In 1910, Morgan discovered a white-eyed variant in one of his bottles of flies. It was the result of a spontaneous mutation in a gene that Morgan named white. In the following century, hundreds of laboratories world-wide have made Drosophila one of the most intensively-studied species known.

Genetics of Drosophila melanogaster - Biology Junction

In other words, a 1:1:1:1 ratio.
Online Drosphila Genetics Lab
Hypothesis for Part 4
If a female fly with a tan body is mated with a wild type male fly, then the offspring should be all wild type.

AP Biology Fruit Fly Lab - the Genetics of Drosophila ..

This created the F1 generation used in the next cross.
Hypothesis (part 3)
Part 4

Source of Error
The main source of error in the Drosophila
lab was that the results from each trial were
completely random.

Drosophila Virtual Lab - The Biology Corner

Genetics & Drosophila Melanogaster Lab Report Background: For two months, you will breed Drosphila melanogaster (fruit flies) and set up genetic crosses in.