Fly report3 - Stan Moaraf t.a David Friday pm lab FLY EXPERMENT Throughout history there have been many scientist that experimented on inheritance

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Stan Moaraf t.a David Friday pm lab 03/14/08 FLY EXPERİMENT Throughout history there have been many scientist that experimented on inheritance of traits, genes, alleles, dominant and recessive traits. But one scientist stands out the most. Gregor Mendel has changed the way we look at genetics and took the first step that led us to the knowledge about genetics that we have today. Gregor Mendel carried out his experiments on peas in a small garden from 1856 to 1863. His hypothesis was that the factors that effects our genetic make-up remain unchanged as they pass through generations from parent to offspring. He quantified the outcome from his crosses and looked at the numerical ratios. Mendel used peas in his experiment because they were easy to grow and investigate although they don’t have many different phenotypes their simplicity helped Mendel to in his numbers. He took the first step using peas but after his experiment Drosophila flies became the genetic model that has been widely in cross experiments. They provide a much complex phenotype range and they can be grown in large numbers in short time periods. One of the first scientist that understood their impotents was Tomas Hunt Morgan. He used the advantage of the simplicity of the sex genes in Drosophila, to study the mutations in the eye color with are determined by the sex genes. He studied the mutations that can cause metabolic blocks that can knock out pigments and change the eye color. Morgan took the first step in understanding herniated traits.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This experiment is designed to analyze the inheritance of eye color and wing type in drosophila. Similar to the experiment designed by EMBO J. 1989 December. In this multi week experiment the inheritance pattern of an eye color and wing shape that are both affected by autosomal and sex-linked genes will be determined. By preparing an initial cross the progress of the following generations will be observed throughout several weeks. Both wing shape and eye color are going to be recorded in order to understand the inheritance pattern. For the first week of our experiment the (p1) parental cross was prepared. We prepared three vials each containing pure breed virgin female flies with vestigial wings and white eyed males. These cultures than were left to mate for a week in a temperature controlled environment. Week 2 the parental (p1) flies was removed from the vials and only the larvae was left. By removing the parental generation we avoided the mating between the parents and the new generation which could lead to unwanted genetic variability in our experiment. Week 3 we recorded the results from the p1 cross and counted the f1 flies. The vials for the next step were prepared by the new f1 flies red eyed and long winged flies were used as the parental generation to the f2 flies. Although the new f1 flies seem similar to the parent flies they carry a recessive mutant gene in their genotype .Week 4, the f1 parental flies were removed from the vials and the
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/16/2008 for the course BIOLOGY history taught by Professor Baily during the Spring '08 term at Northeastern.

Page1 / 11

Fly report3 - Stan Moaraf t.a David Friday pm lab FLY EXPERMENT Throughout history there have been many scientist that experimented on inheritance

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online