Gregor Mendel : The Principles Of Mendelian Inheritancetics

In this experiment we tested to see what the offspring of an unknown cross of an F1 generation would produce. After observing the F2 generation and recording the data we found some of the Drosophila showed mutations, two in particular. The mutations were the apterus wings, and sepia eyes. After collecting our data through observation, a Chi-test was conducted resulting in a Chi-value of 5.1 and a p-value of .2. Since the p-value was greater than 0.05, there was no significant change in the data. This proved that the Drosophila flies still followed the Mendelian genetics of a 9:3:3:1 ratio.

Gregor Mendel theorized that certain combinations of alleles in a genotype would result in a specific ratio of phenotypes expressed in each generation. For example, in the case of the dominant heterozygous anthocyanin genotype, the P1 with (ANL/anl) crossed with the P2 (ANL/anl) would result in a 1:2:1 ratio for genotypes (ANL/ANL), (ANL/anl) and (anl/anl). However,

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.

Did Gregor Mendel help scientist today? Gregor Mendel experimented with pea plants and came to three conclusions also known as the Laws of Heredity. These discoveries went unrecognized for a period of time because people did not think something could come out of an experiment from pea plants. They were wrong, many years later Mendel’s conclusions are being taught at schools and he is being recognized for them. Gregor Mendel helped scientist understand how genes are passed down throughout generations. He has made it so that scientist now are able to help people with disorders because of the traits that they have.

The Drosophila melanogaster is a fruit fly with a very short life cycle. They can be winged or wingless, and have red eyes or white eyes. The different options are called alleles. Alleles are the variants of a specific gene, and one is received from each parent on each chromosome. (“What Are Dominant and Recessive?”). It was chosen to use winged females and wingless males to predict the offspring in this experiment. The winged allele is dominant, meaning it only needs one allele to physically appear. The wingless allele is recessive, which gets covered up by the dominant allele (“Fruit Fly Genetics”). Each trait has two alleles in the flies’

The Drosophila melanogaster is one of genetics most studied organisms. This is due to the Drosophila melanogaster being an excellent model organism. The Drosophila melanogaster has a short lifespan and is genetically similar to humans (Adams 2000). This experiment had three major goals. The first goal of this experiment was to determine which eye colors, body colors and wing type are dominant or recessive. The second goal was to determine if the gene for eye colors, body colors and wing type are on an autosomal or a sex chromosome. The third goal was to determine if eye colors, body colors and wing type are physically linked or independently assorting (Morris and Cahoon). First

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.

Abstract The objective of this lab to, develop an understanding of the inheritance patterns observed in a fruit fly. For this experiment we used Drosophila melanogaster as a model organism due to its short life cycle, small size, and its virtual inexpensiveness. Drosophila melanogaster commonly known as the fruit fly used in this experiment provided experimental data that was in agreement with the laws of segregation and independent assortment proposed by Gregor Mendel.

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

For anyone who’s heard of Mendel’s pea plants should also be familiar with the idea of the heritability of traits. Gregor Mendel was the one accredited with coming up with the idea of genetic heritability; the passing on of traits from parents to their offspring. With his peas, Mendel demonstrated that offspring were not the blended versions of their parents. Mendel also created a list of laws, such as the law of segregation, independent assortment, and of dominance. Each law has been tried and tested, and is now considered absolute truth by the scientific community;

The main purpose for this conducting this experiment was to further knowledge on Mendelian Genetics and how traits are inherited from generation to generation. Something that we attempted to solve was which traits were considered dominant and which were considered to be recessive. Drosophila melanogaster also known as fruit flies were used in this experiment, Dihybrid crosses were done to gather information on how characteristics are linked from generation to generation. Our crosses consisted of female wild type with male sepia eye/ ebony body and female ebony with male vestigial. It is shown that some inheritance patterns are due to unlinked genes and linked genes.

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

Gregor Mendel, also known as the “father of modern genetics,” revolutionized the world 's understanding of the inheritance of traits when he experimented with various pea plants over multiple generations. In performing this experiment, he discovered the law of independent assortment and law of segregation. The Law of independent assortment states that genes located on separate chromosomes segregate independently of each other. The law of segregation states that two alleles segregate at different gametes so that each gamete receives only one allele. Brassica Rapa plants were developed by Dr. Paul Williams and a team of scientists at the University of Wisconsin. They are effective for