LAB REPORT DROSOPHILA MELANOGASTER - SlideShare
LAB REPORT DROSOPHILA MELANOGASTER ..
(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
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.