Yellow Dung Fly Breeding

It was decided that there would be 80 vestigial flies and 20 wild type flies to total to an initial population of 100 drosophila. Next, the flies were anesthetized flies using Fly Nap. The flies were counted out to reach desired ratio, sexing the flies making sure there are equal amounts of males and females to be sure there is ample individuals to allow successful mating. The fly’s food was prepared by taking a frozen rotten banana, cutting it in half, mashing up the banana meat, and mixing yeast into it. The

One culture was set up with a small population of eight flies: two wild-type females, two wild-type males, two ebony females, and two ebony males. The wild-type body flies were sexed under a dissecting microscope on a sorting plate,

Heterozygotes, which have the wild type phenotype, have normal sight which gives them the advantage of finding a mate and have a better success with attracting a mate with their courtship song (Kyriacou et al, 1978). The male heterozygous Drosophila had a better advantage at mating than the homozygotes, which were the ebony, and therefore we predict there will be more wild type by the end of the experiment.

However, much of the breeding of scaup occurs into the northern region of the Boreal Forest (Trauger 1971). Males and females can breed by one year of age, however, males in the population may not breed until later due to the high number of males in the population (Afton 1984). Higher number of breeding occurs on wetter years and with non-breeding pairs variables such as: female age and water conditions are taken into consideration (Afton 1984). Successful breeding in southern regions produces a clutch size between 6-14 eggs (Gehrman 1951, Hines 1977). Clutch size is higher in the southern regions possibly due to intraspecific parasitism (Stoudt

The two most easily seen differences between male and female fruit flies are abdomen shape/size and sex

Two sepia virgin drosophila females and five, dumpy drosophila are put in a vial containing agar. Nap was used to anesthetize the flies. After a week f1 had laid eggs and f1 pupas were visible. Parents were removed from vial. A week later the drosophila f1 had developed and were analyzed and counted.

Males were courting either species, but the females were the predictors to whether copulation occurred. A small amount of variance was shown regarding the females. It was seen that female Simulans were not very choosy with who they mated with, however, Mauritiana females were very choosy both with the intersexual copulation and intersexual copulation. The Mauritiana flies still mated with their own species more than that of the other species but in low amounts. Males will still try to copulate with either species trying to pass on their traits but the females are choosy and decide who it is that will win.

When we started the project one of our main points was to figure out if we were close to the result that we had collected. In general, we stayed in a range from being fifteen to fifty flies off. In my opinion, this was surprising because I thought that we were going to have a much larger gap of too many flies or too little flies. Also, by having all nine classes, adding up their data I thought we were going to be much further off than it turned out to be. Since the data was off by fifteen to fifty flies, I think that one thing that could have affected this was what flies decided to have offspring and which ones decided to not pair up. It all depends on the combination of the flies to get the

This result is not very clear, since the purpose of the outcome does not suggest whether the use of space is correlated with environmental factors shaping mating

The way this was tested was by placing the African dung beetles in two different environments. One environment tested how a

The Bactrocera Tryoni common name is the Queensland Fruit Fly. This insect is located from in various part of Austrulia such as Queensland, New South Wales, and East of Victoria (www.agriculture.vic.gov, N/A). The Queenland Fruit Fly total life cycle requires three weeks in the summer and two months in the fall (State of Queensland Department of Agriculture and Fisheries).

Viviparity (live birth) is a highly uncommon form of reproduction in the insect world, those that do have this type of reproduction fall into two main groups: those who have a high offspring rates and those who have low offspring rates. Viviparity, while uncommon, does serve a distinct purpose. In some cases the insect has very few ovarioles to begin with, in which case, it is essential for the offspring to be given the best chances at survival they can get. Having the embryo safely protected inside the insect while it develops gives the young insect a far better survival rate than those who are deposited in eggs outside the mother. In other cases, such as with Aphids, it allows for a ‘telescoping generations’ effect which greatly increases the numbers of

Our experimental results correlate to scientific facts. There was an increase in the wild allele and that is because it is the dominate allele. It was only on the third week there was an increase in the ebony allele; furthermore, that increase could be explained by chance or caused by a source of an experimental error in the transferring of the flies into their cultural vials. The increase in the female gender could be explained by natural selection and the survival of the fittest. The chi-squared value continued to increase over the weeks, which means that the

When born, fruit flies are sheltered in an oval shaped egg and can be seen with the naked eye. After approximately a day or two, the larva erupts from its shell, immediately looking for any source of food. They have a tendency to tunnel through objects. They shed continuously until they become a mature larva. Once the mature larva becomes a pupal, it usually climbs on the cultural bottle they are sealed in and form a pupal case. In there, the pupal must go through the stages of metamorphosis until they become a male fruit fly. Once an adult fly, the eyes, wings, and legs become visible with the naked eye. Like peas, they do not have a long life span and can reproduce very quickly. They need little food, occupies minimal space, and have many types of genetic variations that can be seen in the offsprings.

The results of the experiment are not too shocking because it commonly acknowledged that men have greater sexual desires and demands than that of females. Clark had some speculations when the results of the experiment were developed citing reasons why the numbers vary so much between