Hardy-Weinberg Law Of Equilibrium Experiment

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Introduction:
The purpose of this laboratory activity is to investigate the Hardy-Weinberg Law of Equilibrium using the fruit fly Drosophila melanogaster. According to the Hardy-Weinberg Law of equilibrium, allele frequencies should remain the same in large populations that do not experience gene flow, mutations, nonrandom mating, and natural or artificial selection. We will be studying the alleles that determine wing shape, either normal (wild type) wings or vestigial wings. Vestigial females will be crossed with equal numbers of vestigial males and wild type males. I this population is at Hardy-Weinberg equilibrium we would predict an equal number of wild type and vestigial offspring in the next generation.
However, according to Bastock and Manning
An equal number of females and each type of male were introduced into each test tube, but in my own sample and those of others in the class there were mortalities throughout the experiment. Both some of the original flies and some offspring died during the experiment which could have influenced the results. If a vestigial fly died before it could mate that would give the wild type males an advantage in mating and producing a greater number of offspring. This would also be the case if any flies were harmed at any time during the mating period. To try and combat this problem the next time this experiment is done a larger number of male fruit flies could be used or more samples taken to try and reduce extremes in the data.
Studying fruit fly mating behavior is very important because their generation length is so short and reproduction happens rapidly. In science, these fruit flies can be used to study genes and mutations relatively quickly because of the limited life span. Knowing mating behaviors can help scientists better understand their results and improve their experiment designs to reduce

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