Laboratory Sessions - Drosophila (Fruit Fly) Experiments - Science Assignment Help

Assignment Task:

Task:

Introduction
The first three laboratory periods involve working with live fruit flies. Scientifically, it is called Drosophila melanogaster.

Drosophila melanogaster (dros “fruit”, phila “to like”, melano “brown”, gaster “belly”) is the most studied multicellular organism in regard to Mendelian Genetics. All of its genes on its 8 chromosomes have been mapped long before the DNA techniques were available. The haploid number of chromosomes is 4, with one of these being a sex chromosome (X or Y). The males have XY and females XX, so they show sex-linked traits in the same fashion as in humans.You will work in pairs and assign the task of:

• Practice, observe and learn monohybrid cross in fruit flies
• Become familiar with the life history of Drosophila melanogaster
• Learn how to properly handle and culture living organisms
• Recognize morphological features of the fruit flies
•  Determine how several mutations of the fruit flies are inherited
•  Find out how many genes are responsible for each mutant phenotype
•  Explore whether the alleles of the mutant phenotypes is dominant, recessive, co-dominant or semi dominant
•  Determine if the genes are assorting independently or dependently (i.e. genetically-linked)
•  Use chi-square statistics to test and evaluate experimental results

The "biological schedule” of the fruit flies cannot always be accommodated by regularly-scheduled lab periods. Therefore, you have to come more frequently to the lab and be responsible for scheduling your time to ensure continuity and success of your experiment. Simply, make sure you plan your experiments ahead of time.

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