Crossing of autosomal and sex-linked DrosophilaThe idea of ​​the project was to experiment with the breeding of Drosophila Melanogaster (fruit fly) to understand if some genes of that species were linked to sex or not (autosomal). A monohybrid cross and a dihybrid cross were performed. For the monohybrid cross, the white-eyed female and the red-eyed male were placed in a vial for them to breed. For the dihybrid cross, flies with red eyes and normal wings and flies with sepia eyes and rudimentary wings were placed in their own vial to breed. In the monohybrid cross the expected results were within a 1:1:1:1 ratio. Expected results similar to the proposed desired desired null hypothesis with what the F1 parental generation raises. Potential results should have fallen within the ratios of 9:3:3:1. The results were clear and allowed the null hypothesis to be correct. The white-eyed gene in fruit flies is sex-linked. The sepia eyes and vestigial wings are not sex-linked and are examples of independent assortment. Introduction Genetics has provided us with important results regarding the knowledge of why some organisms and their expressions are the way they are and how some expressions are suppressed due to the fact that those particular expressions are recessive. The reason is because genetics is the study of genes and their effects on organisms. Genes are expected to give the offspring hereditary similarities to the parent. This, however, was not known and Gregory Mendel wondered what is passed from parents to offspring on which the similarity is based. Mendel continued experiments with pea plants to answer short questions. The answers were as short as saying that the transmission of traits from parents to offspring occurs through...... middle of the paper......and 9:3:4:1 but it did not seem to be significant in probability. • Conclusion for class monohybrid cross: p-value 0.222 was within the non-significant range in the chi-square table. The null hypothesis was therefore correct. Eye colors are sex-linked due to the equality in the amount of phenotypes given to both male and female. • Conclusion for dihybrid class cross: p-value 0.779 is in the non-significant range in the chi-square table. The null hypothesis is therefore correct. Sepia eyes and rudimentary wings in flies are a mutation in the genes that is not linked, meaning it is a product of an independent assortment. References Cain, M. L., Urry, L. A., & Reece, J. B. (2010). Campbell's Biology. Benjamin Cummings.Phelan, J. (2011). What is life? A guide to biology with physiology. New York: Peter Marshall.