{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Drosophila Lab - Determining Gene Linkage with Drosophila...

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

View Full Document Right Arrow Icon
Determining Gene Linkage with Drosophila With the Virtual Fly Lab website, various crosses of Drosophila flies are conducted in order to see the effects of crossing over and genetic linkage between traits. In this experiment, shaven bristles and curved wings are crossed together in case 1. In case 2, black body flies and dumpy wings flies are crossed. Hannah Kim November 21, 2009 AP Biology Per 10 Mr. Paulson
Image of page 1

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

View Full Document Right Arrow Icon
Introduction Drosophilia is a common fruit fly that is widely used in genetics because they have short life cycles, they reproduce in large numbers, and they are harmless. Mendel learned from his crosses that some offsprings have combinations of traits that do not match those of either parents. In this case, there are parental type offsprings and recombinant offsprings. The parental types match the parents' combinations of traits. On the other hand, the recombinant offsprings have new combinations. Furthermore, if most of the offspring have parental phenotypes, then the two genes are most likely on the same chromosome, since the occurence of parental types with a frequency greater than 50% indicates that the genes are linked. The rest, about 17%, are recombinants. This is the process of crossing over, which accounts for the recombination of linked genes. Hence, new combinations are formed.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern