scroll to top
Stuck on your essay?
Get ideas from this essay and see how your work stacks up
Word Count: 520
Drosophila melanogaster Sex Linked Inheritance Pattern of White Eye Color I Introduction Drosophila fruit flies has a four-stage life cycle A Drosophila is only an egg for about 36 hours before it becomes a larva During this time it will crawl around and feed on the media for about five days until it crawls out to a dry place where it can pupate As the Drosophila pupates it is going though a metamorphosis the eye color begins to show and the pupa case darkens After hatching the new adult Drosophila is unable to fly for about two hours If a female she will be able to reproduce in 12 hours after hatching and has 50 to 100 eggs only 24 hours after reproducing The full life span of a Drosophila tends to be about 13 days Because of their quick reproductive cycle and inexpensiveness they are ideal laboratory specimens for genetic testing Thomas Hunt Morgan used Drosophila in genetic experiments to support the evidence of the chromosome theory of heredity Morgan knew that in Drosophila females have two X chromosomes and males have only one X chromosome Morgan proposed that the gene for the eye color variant white is located on the X chromosome and that there is no equivalent gene on the Y chromosome The condition of X-linked genes in the males is said to be hemizygous since there is no corresponding allele on the Y chromosome Using Morgans example I have tested experimentally four hypotheses that explain the passage of the white-eyed gene The possibilities are autosomal dominant autosomal recessive X-linked dominant and X-linked recessive II Methods I was provided virgin red-eyed females from my instructor The Drosophila virgins were taken out of a red-eyed dominant group at the 8-hour of their adult life This is because there is a span of 10 hours were the female is able to fly and its sexual maturity I started with
@Kibin is a lifesaver for my essay right now!!
- Sandra Slivka, student @ UC Berkeley
Wow, this is the best essay help I've ever received!
- Camvu Pham, student @ U of M
If I'd known about @Kibin in college, I would have gotten much more sleep
- Jen Soust, alumni @ UCLA