Mode Of Inheritance : A Important Area Of Study

Introduction: The intention of this lab was to gain a better understanding of Mendelian genetics and inheritance patterns of the drosophila fruit fly. This was tasked through inspecting phenotypes present in the dihybrid crosses performed on the flies. An experimental virtual fly lab assignment was also used to analyze the inheritance patterns. Specifically, the purpose of our drosophila crosses is to establish which phenotypes are dominant/recessive, if the traits are inherited through autosome or sex chromosomes and whether independent assortment or linkage is responsible for the expressed traits.

The motivation of this lab report is to use Mendel’s Laws of Inheritance to analyze and predict the genotypes and phenotypes of an offspring generation (F2) after knowing the genotypes and phenotypes of the parent generation (F1). The hypothesis for this experiment is that the mode of inheritance for the shaven bristle allele in flies is autosomal recessive in both male and female flies.

Genes can either be sex-linked or autosomal. If a gene appears mostly in one sex chances are the gene is sex-linked and if it appears frequently in both sexes it is most likely autosomal. Using Drosophila melanogaster, also known as the fruit fly, we will determine whether the gene is sex-linked or autosomal. Drosophila melanogasters have a relatively short life span and are an excellent organism for genetic studies because it has simple food requirements, occupies little space, is hardy, completes its life cycle in about 12 days at room temperature, produces large numbers of offspring, can be immobilized readily for examination and

Beginning in 1856 with Mendel's work on heredity, it tells the story of man’s struggle to decipher the human genome, understand it, and use it for both good and evil. The Gene: An Intimate History also tells the personal story of the Mukherjee family and their

The major topic of this experiment was to examine two different crosses between Drosophila fruit flies and to determine how many flies of each phenotype were produced. Phenotype refers to an individual’s appearance, where as genotype refers to an individual’s genes. The basic 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 (one dominant and one recessive

As “the father of modern genetics”, Mendel made a huge impact on science by discovering the basic laws of heredity, with dominant and recessive traits. Through these discoveries he inspired many scientists to jump onto genetics and try to replicate his experiment to confirm his results.

This paper will discuss how phenotypes are driven by DNA inheritance in offspring by the genes known as alleles. Each parent provides an allele although on allele is hidden in one parent and can be passed on to his or her offspring. The information presented in the monohybrid cross that shows where one parent has the hidden allele of a gene that carries the trait of orange eyes that disappears and reemerges later in the genetic make-up of an offspring. The inheritance in the offspring is driven by the DNA of that individuals parents and the genetic traits one is born with are decided by the dominant and recessive genes of his or her parents (www.nature.com, 2014).

Drosophila melanogaster are commonly referred to as the fruit fly. The fruit fly is often used in genetics experiments for several reasons: they are small and easy to keep in a lab, their life cycle only spans about three weeks, their genome is short and able to be quickly read, and lastly they have X and Y sex chromosomes similar to humans. (Jennings, B. 2011). This experiment uses Drosophila melanogaster to parallel gene inheritance in humans and closely examine some of the phenomenon’s that occur in DNA.

Drosophila melanogaster may just be small little fruit flies that feed on rotten fruit but this little creature happens to be one of the most valuable organisms in understanding genetic research. The D. melanogaster are commonly used in studying genetic traits because they are useful, small and have an extremely short life cycle (6). Our experiment shows precisely how D. melanogaster are used to identify mechanisms of transmission genetics in eukaryotes. Simple parental crosses were done to obtain both F1 and F2 generations. This was done so we could determine if the apterous (a wingless phenotype) and the sepia (dark brown) eye color of the fruit flies follows Mendelian inheritance or not. Our F1 generation displayed all offspring with red-eyes and wings; which follows Mendel’s principles. Our hypothesis is that our experiment will follow the classic inheritance patterns because the sepia traits and the wing traits display a dominant/recessive pattern in the D. melanogaster (4). If our hypothesis is correct, then we predict to see an entire F1 generation of red eyed fruit flies with wings and an F2 generation of 9 normal

Do you know who the Father of genetics is? No, OK well in this text I will tell you who he is. The name that I was talking about is Gregor Mendel. In this text I will be talking about his younger life and college life, then I will be talking about his experiments with peas. I think that you should learn about him not only how genetics work but also so you can learn about the tool and how they learn about things back then.

I would like to nominee Gregor Johann Mendel for the "Carleton Prize for Biotechnology". Gregor Mendel is an Australian Scientist who has been credited for discovery of the science of genetics based on his experiments, breeding peas in the monastery garden at Brünn. He identified the basic genetic heredity of living organism and discovered genetic through an experiment in his garden, (Numbers, R. L. 2015). Gregor Mendel was born on July 20, 1882 in Heinsendorf Bei Odraua, a small village in Australia (Haas, L. F.1998). Mendel’s parent owned farms for

“My scientific studies have afforded me great gratification: and I am convinced that it will not be long before the whole world acknowledges the results of my work.” -Gregor Mendel. Gregor Mendel, a.k.a “the father of genetics” was an Austrian monk and he is credited for discovering hereditary units. Mendel discovered hereditary units by breeding thousands of plants. Mendel specifically chose pea plants because they reproduce quickly and he could control how they mated. The pea plants showed Mendel that genes were hereditary. Mendel’s knowledge of genetics and heredity is relevant in today’s society for many reasons.

Scientists all across the world have used model organisms to study genetics. These organisms are selected based off of easily noted physical characteristics, their small sizes and relatively short generation time, and also being readily available to use and tractable. That is why Drosophila melanogaster is a great model organisms because it fits all these characteristics. I propose further research on sex-linked eye color mutations in D. melanogaster because studying sex-linked traits will

Drosophila melanogaster are a great species for students to learn the process of Mendelian inheritance. They reproduce rapidly and have distinct phenotypes that are easily observable under a microscope. The experiment involved anesthetizing, observing and categorizing these flies based on their wild type and mutant phenotypes to figure out the mutant phenotypes mode of inheritance. We hypothesized that for the mutant vestigial wings phenotype, the mode of inheritance was autosomal dominant. Based on our chi-square value of .57 and p-value of .05, we failed to reject our hypothesis. Comparing our data to other research we learned that the actual mode of inheritance of the vestigial wing mutant phenotype is autosomal recessive. The error could have been from the fact that we did not have a sufficient number of flies to analyze and therefore gave us an inaccurate ratio of wild type to mutant phenotypes.

3. Carlson, Elof Axel. Mendel's Legacy: The Origin of Classical Genetics. Cold Spring Harbor, NY: Cold Spring Harbor Laboratory, 2004. Print