Examining the Crosses Between Drosophila Fruit Flies Essay -- Fruit Fl

Examining the Crosses Between Drosophila Fruit Flies Introduction The major topic of this experiment was to examine twain contrastive crosses between Drosophila fruit flies and to determine how many flies of each phenotype were produced. Phenotype refers to an individuals appearance, where as genotype refers to an individuals genes. The canonical law of genetics that was examined in this lab was formulated by a man often times called the father of genetics, Gregor Mendel. He determined that individuals have two alternate forms of a gene, referred to as two alleles. An individual can me homozygous dominant (two dominant alleles, AA), homozygous recessive, (two recessive alleles, aa), or heterozygous ( unmatched dominant and one recessive allele, Aa). There were tow particular crosses that took place in this experiment. The first cross-performed was Ebony Bodies versus Vestigle Wings, where Long fly argon dominant over short wings and normal bodies are dominant over black bodie s. The other cross that was performed was White versus Wild where red eyes in fruit flies are dominant over white eyes. The purpose of the first experiment, Ebony vs. Vestigle was to see how many of the offspring had normal bodies and normal wings, normal bodies and vestigle wings, pitch black bodies and normal wings, and ebony body and vestigle wings. The purpose of the second experiment White vs. Wild was to see how many of the offspring were red eyed male, white eyed male, red eyed female, and white e...