Drosophila Melanogaster Experiment Essay

In this population cage, it used Drosophila melanogaster because is a common model organism for genetic studies. In this population cage, it was calculated the coefficient of selection of an actual sample and an ago sample. In this experiment, it was used the actual sample #4 and the ago sample #3. The result of the coefficient of selection should be at the rate between 0 and 1. The result was 0.82, so it was a good result of the coefficient of selection between these two samples (#4 and #3).
At the beginning of this experiment, it was placed 15 wild type females and 15 wild type males. Also, it was placed the same amount of mutant flies such as 15 apterous females and 15 apterous males, but it saw a big difference in each sample, when wild type have more flies than apterous flies.
Male inseminate female for internal fertilization, and then the female lays egg, about 100 eggs per day or 500 eggs within 2 weeks. It takes about 24 hours for an egg to hatch into a larva. The third instar stage, the larva will crawl up the sides of the jar, attach itself to a dry surface and form the pupa. After about four days in the pupal stage, an adult fly emerges. The life cycle takes only 10 days for this type of fly. In addition, Drosophila melanogaster female can mate about 6 hours after emerging from the pupa case.
In the case of apterous flies, they usually are recessive allele. It was believed that apterous flies have short-lived and apterous females would be sterile. The slow behavior of apterous fruit flies makes them unlikely to survive a population cage. They have a disadvantage in the wild and often wind up as food. These flies can pretty much survive only in a biology lab because they cannot compete with other fruit flies for