Genetic Predictions in the Fruit Fly

For our first generation (F1) of flies we chose to cross apterous (+) females and white-eye (w) males. We predicted that the mutation would be sex linked recessive. So if the female was the sex with the mutation then all females would be wild type heterozygous. Heterozygous is a term used when the two genes for a trait are opposite. The males would all be white eye since they only have one X chromosome. If the males were the sex that had the mutation then all the flies would be wild type but the females would be heterozygous.

2- The greatest concern about having the pests in restaurants is that they will -----------

One possible error that may have occurred was that some of the adult flies may have accidentally been left in the vials with their offspring,

2. Place 10 randomly selected sowbugs in each of the 3 empty tin bowls for 3 minutes to allow them to acclimate to the environment.

Genes can either be sex-linked or autosomal. If a gene appears mostly in one sex chances are the gene is sex-linked and if it appears frequently in both sexes it is most likely autosomal. Using Drosophila melanogaster, also known as the fruit fly, we will determine whether the gene is sex-linked or autosomal. Drosophila melanogasters have a relatively short life span and are an excellent organism for genetic studies because it has simple food requirements, occupies little space, is hardy, completes its life cycle in about 12 days at room temperature, produces large numbers of offspring, can be immobilized readily for examination and

11. The progeny of a Drosophila female (heterozygous at three loci: y, ct, and w) crossed to a wild type male are listed below:

In 1961, a man named Dick Cabela decided to sell fishing flies that he recently purchased at a furniture show in Chicago. Once he returned to his home in Chappell, Nebraska, he created a newspaper ad for the paper, Wyoming paper that read: “12 hand tied flies for $1.” Unfortunately, Dick Cabela could round

We began the experiment by dividing into pairs and selecting one mutation of flies. Claire and I started off with Vestigial Flies. We then got our supplies; three clean tubes, three caps, three sponges, fly nap and wand, dissecting microscope, paintbrush, and three small plastic plates (for separation). As a team, Claire began to tap the container containing the mutant flies (this way they stayed at the bottom), while I had my extra sponge and clean tub ready to stick on top of hers’. After counting down to three, she pulled the sponge on her fly container and I quickly placed the empty vial on top. I then flipped the vials upside down and proceeded to knock as many to the empty vial as I could. We did the exact same step as before, counted

6. Repeat this process for each generation and make the proper adjustments required for each.

5. Again, set the number of offspring to the maximum of 6. Then, click the Cross button repeatedly until these parents have produced about 100 F1 offspring.

Well basically what we did in this lab was save a gummy worm from drowning using only paper clips. It may sound difficult but it was actually really simple. We just had to get our lifesaver which is the thing that will save Fred from drowning and put it over him like if you were putting fred a shirt on. But we can’t use our hands at all just the paper clips. In this lap we also learned that worm are part of the animal phylum called Annelida. We learned what annelids were and how their reproduction, circulation, excretion, gas exchange nervous control work out.

Fruit Flies were observed throughout most of the experiment. Observing the sex differences between male and female under the microscope help identify the phenotypes as well. For example, it was possible to see if the fruit flies were female or male wildtype, vestigial, white-eye and white eye vestigial. The observations to distinguish female or male fruit flies is that males fruit flies have sex combs on front of their legs. Another observation that can be distinguish between male and female fruit flies is that males have a darker ventral posterior section in the abdomen. Female fruit flies is just plain nothing showing. And lastly, another observation that is used to distinguished between male and females fruit flies is the size. It is considered

The F2 Drosophila produced from crossing the wild-type offspring of the parental cross wild-type males and no-winged females. The F2 generation consisted of 38 wild-type females and 35 wild-type males, totaling 73 Drosophila. There were also 16 no-winged females and 11 no-winged males, totaling 27 Drosophila. Therefore, the total number of Drosophila counted was 100. The phenotypic ratio was 3:1, wild-type: mutant. If the mutation were autosomal recessive the F2 generation’s hypothesized phenotypic ratio would be 3:1, wild-type: mutant. If the mutation were autosomal dominant the F2 generation’s hypothesized phenotypic ratio would be 1:3, wild-type: mutant. The expected ratio for the F2 generation was 3:1, wild-type: mutant. When chi-square

incubation at 28 ° C for 20, 40, 80, 160 and 350 days. After 350 days, 56% of 2,3,7,8-

A determining factor for how rapid the life cycle of Drosophila’s occurs is the environment. The first hypothesis for this experiment was, it is expected for the parents placed in the vials to die in increased temperature after one week. Also it was expected a new generation would be present in both vials after one week with the expectation of the progeny in the early larvae stage. The final hypothesis was there won’t be too much of a difference in the vials simply because the temperature difference was not