A Study Of Inheritable Traits In Fruit Flies Essay -- fruit fly geneti

A Study Of Inheritable Traits in Fruit goINTRODUCTION The Drosophila melanogaster, more than commonly known as the growth fly, is apopular species used in genetic experiments. In fact, doubting Thomas Hunt Morgan began victimisation Drosophila in the early 1900s to claim genes and their relation tocertain chromosomes(biota 263). Scientists adopt located everyplace 500 genes on thefour chromosomes in the fly. There are many advantages in using Drosophila forthese types of studies. Drosophila melanogaster can lay hundreds of eggs after full star mating, and have a generation time of two weeks at 21C(GeneticsDrosophila Crosses 9). Another reason for using fruit travel is that they maturerather quickly and dont require genuinely much space. Drosophila melanogaster has alife cycle of four limited stages. The first stage is the egg, which is about .5mm long. In the 24 hours when the fly is in the egg stage, numerous cleavagenuclei form. Next, the egg hatches to reveal the la rva. During this stage,growth and drop occur. Once growth is complete, the Drosophila enter thepupal stage, where it develops into an adult by dint of metamorphosis. Uponr to severally oneing adulthood, the move are ready to mate and produce the following(a) generationof Drosophila melanogaster. During this experiment, monohybrid and dihybrid crosses were conductedwith Drosophila melanogaster. Our objective was to examine the inheritance fromone generation to the next. We collected the data from the crosses and analyzedthem in relation to the judge results.MATERIALS AND METHODSFor the monohybrid cross in this experiment, we used an F1 generation, whichresulted from the mating of a male homozygous wild-type eyeball fly with a femalehomozygous sepia eyed fly. Males and females are distinguished by differences inbody shape and size. Males have a darker and rounder abdomen in comparison tofemales, which are more pointed. Another difference occurs on the forelegs ofthe fliesma les have a small(a) bump called sex combs. At week 0, after beinganaesthitized by fly-nap, three males and three females were identified under adissecting microscope and placed in a plastic vial with a foam stopper at theend. The vial remained on its side until the flies regained consciousness sothat they didnt get trapped by the culture medium at the bottom. We allowedthe Drosophila to incub... ...eighed the number of males. This may imply that the X chromosomeis dominant over the Y chromosome. This would cause the X chromosome to mixwith another X chromosome, producing a female, more often than it would mix withthe Y chromosome, which would produce a male. As a follow-up to the experiment,I would perform many more trials than each person did for this experiment. Also,more flies could be placed in each vial to ensure even more offspring to beinclude in the data. I would also be sure to remove the flies after just oneweek to reduce breeding amidst generations. This experiment cau sed Mendelsfindings to be more concrete and realistic in my mind. It do the informationmore than meaningless numbers. The experiment also made me realize how easilybiological ideas can be proved. Our results agree with Mendels discoveries.The only drawback to our learning was the massacre of over 26,000 fruit flies.REFERENCESCampbell, Neil A., Biology tail Edition. Menlo Park Benjamin/Cummings,1996. Genetics Drosophila Crosses. Lab Handouts, ordinary Biology Lab, 2008.So Whats a Monohybrid Cross Anyway? Lab Handouts, General Biology Lab, 2008.