Classical genetics

Introduction Using Drosophila, the goal of this lab was to study and identify the genetics behind certain traits through to use of dihybrid crosses. With the crosses, the purpose was to find the different dominant and recessive traits in the eyes and wings of the Drosophila. Flies were used to study the genetics as opposed to other insects or animals because they are easy to mass-produce and the traits, when viewed under a microscope, are easily identifiable. The hypothesis was that the traits of sepia eyes and apterous wings were autosomal recessive. Procedure The procedure and steps for the analysis of the cross was very straightforward. In the first week, the F1 vials were collected and after sexing the anesthetized F1 flies, five females…

The Drosophila melanogaster, also known as the fruit fly, was the primary research subject for Thomas Morgan. In 1910, Morgan used the fruit fly as an experiment to discover new mutations which could represent new species. Using the flies to research about heredity gave way to Gregor Mendel’s confirmation of his Chromosomal Theory of Inheritance which suggests that the chromosomes are the carriers of genetic information. The sex of the fly is important when culturing Drosophila and making…

The purpose of this experiment was to find out why Drosophila melanogaster is an important organism to understand eukaryotic genetics which was accomplished by first observing the sex of the flies and distinguishing between wild type and vestigial wing phenotypes. We also determined whether the allele that caused the vestigial wing phenotype is sex- linked or autosomal and either dominant or recessive from flies that were in the F1 generation. Our data collected by observing the sex of the F1…

1. Objective The objective of this lab is to test whether the dominant phenotype in flies is actually straight wings red-eyed using data stimulated from the FlyLab software. Hypothesis The mode of inheritance in flies is that red eyed, straight winged flies are the wildtype characteristics that are autosomal dominant and white-eyed, vestigial wings are the mutated characteristics. 2. Methods a. Performed a cross between a red-eyed straight winged female fly and a white-eyed, vestigial winged…

This lab was very effective for experiencing the breeding of traits in a realistic simulation and correlating these visual presentations into the Punnett Squares. The objective of this lab was to notice and explore the key differences between genotype and phenotype. Where phenotype is the physical characteristics of a trait, and genotypes are all the possible genetic combinations an organism can obtain from its parental generation. Two mice were used in this experiment, and these two mice were…

Purpose: The purpose of this simulation is to demonstrate how alleles work and practice the skill of figuring out what genotype is dominate based off of the phenotype of the offsprings. Background info: Fruit flies or Drosophila melanogaster work best in experiments because Drosophila melanogaster has 60% of genes that are mutated, amplified, or deleted in human diseases. Drosophila melanogaster also has a short lifespan which makes them best for quick experiments. They also mate and develop…

The film Gattaca, (1997) directed by Andrew Niccol acts as a response to the potential social and identity issues a possible dystopian future could present due to genetic development. Gattaca’s political system utilizes the ideology of genoism to divide society into classes through emphasizing the nurture side of the nature versus nurture, consequently maintaining social control. Genetic determinism can be utilized to objectify humans into human resources, manipulating what one’s identity is as…

Prokaryotes can be recognized as a single-celled organism that lack the extensive internal compartments. Unlike eukaryotes, the prokaryotes concentrated their genetic materials in a small portion of cell’s cytoplasm known as nucleoid. Almost entire prokaryotic genome is contained in a single circular DNA strand that is supercoiled. Some additional genes are located on an independent small, circular or linear plasmids which coding for extra properties likes antibiotic resistance (Brown, 2002).…

Title: HAIR GENETICS A study of DNA sequence variations in melanocortin-1-receptors or MC1R genes found many variants of amino acid found in people who were red-haired but rarely found in the non-red people. Researchers have identified 3 common amino-acid-polymorphisms associated commonly with red haired people viz., R160W, R151C, & D294H. The abbreviated names mean common amino acid types were found in positions 160 151, & 294 in proteins are arginine (R), cysteine (C), arginine & aspartic…

mental health. Then, it will discuss and demonstrate examples on the interaction between genetic and environmental aspects in forming the temper, and the development of depression; it also shows how much each of these factors plays a role in the development of mental illnesses. In addition, it explains theirs roles in the phobias’ aetiology and treatment, and in the coping strategies and resilience that people show when facing these illnesses. The term genotype is related to the combination…