Analysis on Inheritance in Drosophila Melanogaster

Analysis on Inheritance in Drosophila Melanogaster -...

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Analysis on Inheritance in Drosophila Melanogaster (Fruit Fly) Amanda Billingsley INTRODUCTION Drosophila melanogaster is a genus of small flies also called fruit flies. The female Drosophila melanogaster will have a pointed abdomen with several dark stripes, while the male has heavy pigmentation with a rounded tip. Females are also noticeably larger than the males. Their life cycle consists of four stages which are the egg, larva, pupa, and then adult (Vodopich). This experiment demonstrates the transmission of certain genetic traits, eye color and wing type, in Drosophila melanogaster . Fruit flies are ideal for studying genetic inheritance because of their speedy reproductive cycle and that their phenotypic traits can be observed easily. Several test crosses will be performed, resulting in multiple generations of fruit flies. The phenotypic outcomes are then recorded, analyzed through Chi-square test, and compared to ratios derived from Mendelian crosses. I hypothesize that the outcomes of the experimental cross will not be the same, or similar to the Mendelian Cross. MATERIALS AND METHODS The process of the experiment was uncomplicated, mainly observing and recording outcomes, but was time consuming. The starting materials were a culture vial containing nutrient media, the parental (P1) generation of flies, and Flynap. Flynap is an organic compound that anesthetizes the flies for at least thirty minutes. The traits that were tested were eye color and wing type. Flies with red eyes are wild type, which is a dominant trait.
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Dominant traits are the typical form of the gene as they occur in nature. The mutant trait
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Analysis on Inheritance in Drosophila Melanogaster -...

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