Demonstrating Genetic Principles Using Garden Pea Plants

1051 words, 5 pages

Intro Sample...


This lab is based on the experiment that Mendel did with the common garden pea plant, which is when he cross-bred them in order to see how genetics worked. His experiments had many unambiguous genetic markers, perfect to show in the classroom; thus in this experiment. In this experiment, the focus is on encoding six morphological traits: I-i locus which determines a yellow (I) versus a green (i) color, R-r which determines whether it is a smooth (R) or wrinkled (r) seed, Tl-tl for if it produces tendrils (Tl) or terminal leaflets (tl), Td-td for the presence (Td) or absence (td) of foliar dentation, St-st if it has normal (St) or reduced (st) stipules, and le-le to determine if it has a normal height (Le) or a dwarfed height (le).
With... View More »

Body Sample...




Results
Scores for pea characters


Monohybrid (3:1)

Dihybrid (9:3:3:1)

Beginning with the monohybrid cross, it is expected that out of the 60 samples, 45 should be dominant and 15 should be recessive. What actually happened was that, usually, there were more dominant species than expected, therefore less recessive species than expected. When using the chi-squared test to figure out the probability, all of the variables ended up within the acceptable range of differences between the expected and observed outcomes.
With the dihybrid crosses, on the other hand, there is a total of four possible outcomes in the F2 generation. The homozygous dominant traits, again, tend to have more than what is expected, but the rest of the information varies. When looking at the chi-squared test results, two out of the three crosses are likely to happen 5% or less of the time; these two are the crosses between stipules and tendrils, and stipules and seed texture. One out of the three results show a peculiar result, having a probability of greater than the 5% in occurrence. This is seen in the cross between tendrils and seed texture.
Discussion
For the monohybrid cross, it makes sense that there were more normal stipules, tendrils, and normal height pea plants in comparison to their counterparts because normal height pea plants were dominant over those dwarfed in stature; yellow was dominant to green; and smooth was dominant to wrinkled. Whichever trait is dominant will tend to appear more often that its recessive counterpart. This, overall, seems to be normal because in ...

Read More

Related Essays on Demonstrating Genetic Principles Using Garden Pea Plants

  • Microbiology

    1883 words, 8 pages

    Introduction: Biological organisms are classified uniformly in order to easily categorize and identify organisms. This classification, or taxonomy, uses the genus name followed by the species name, in Latin. By having a universal method of identifying bacteria allows for all scientists from any part of the world to identify the same species in an identical manner allowing for a precise of classification. Bacteria are distributed throughout the world in almost every conceivable habit. Bacteria are unicellular microorganisms, with variable shapes and nutritional needs. They lack a disti

    View Document »

    Nuclear Energy

    1304 words, 6 pages

    Some may ask what nuclear energy is, the dictionary defines this as: 1. The energy released by a nuclear reaction, especially by fission or fusion. 2. Nuclear energy regarded as a source of power. Also called atomic energy Nuclear power was first known to be researched in the early 1900's, and by the world war; it reached its greatest peak by demonstrating to the world its power to destroy. Nuclear energy can be good or bad, depending on how the person works with this material; it is used for both sides good and bad. Scientists were unsure from the beginning of how it was possi

    View Document »

    Using Neural Networks To Forecast Stock Markets

    7649 words, 31 pages

    Using Neural Networks to Forecast Stock Market Prices Abstract This paper is a survey on the application of neural networks in forecasting stock market prices. With their ability to discover patterns in nonlinear and chaotic systems, neural networks offer the ability to predict market directions more accurately than current techniques. Common market analysis techniques such as technical analysis, fundamental analysis, and regression are discussed and compared with neural network performance. Also, the Efficient Market Hypothesis (EMH) is presented and contrasted with chaos theory and

    View Document »

    The Door In The Wall

    661 words, 3 pages

    The Door in the Wall Confiding to his friend Redmond who narrates “The Door in the Wall,” Lionel Wallace relates that a preoccupation is gradually coming to dominate his life, one that is even affecting his career as a successful politician. Long ago as a lonely child of five he had wandered out of his home into the streets of West Kensington in London, where he noticed a green door set in a white wall. It was very attractive to him, and he wanted to open it, but at the same time he felt that his father would be very angry if he did. Wallace’s father is described as “a stern preoccupied lawye

    View Document »

    Atmospheric Pollution

    2138 words, 9 pages

    Atmospheric Pollution As I had started my research on atmospheric pollution, I had come to find that it all coincides with global warming. Due to the gases that are being released in the air from vehicles, it starts to destroy the atmosphere. However, it is not just the gases from the vehicles, there are also gases from power plants and aerosol cans, for example, hairspray. Smokers also contribute to the pollution in the atmosphere. All of this will be discussed further into the paper. The one thing that was asked was to give a detailed description of the problem. Coming up with a d

    View Document »

    Darwinism:

    1938 words, 8 pages

    Selective Breeding and Genetics Darwinism and the theory of natural selection had far reaching implications for society both culturally and scientifically. For the first time in history a theory was proposed that offered a plausible mechanism for evolution. This paper examines the science behind natural selection as well as the impact Darwin has had on modern evolutionary paradigms. Specifically it poses two questions: (1) How did Darwin formulate his ideas about natural selection and evolution? And (2) Is natural selection still fundamentally valid or have we moved into a new evolutionary

    View Document »

    Bailout

    3077 words, 13 pages

    UGBA107 Coming into his first term as President, a huge controversial issue that President Obama had to take a stand on was whether or not to bailout American car company General Motors, as the company was strongly affected by the weak United States economy. After advocating and eventually handing out a huge bailout several years ago, General Motors is again in the spotlight because of its large amounts of investment in plants in Mexico to outsource work. Many American taxpayers believe it is wrong for General Motors to give jobs to non-Americans especially after the huge government bailou

    View Document »

    Whay Is My Garden Green?

    395 words, 2 pages

    The obvious people to ask are Thames Water, who have just announced a hosepipe and sprinkler ban on their eight million customers from April 3. But they are unsympathetic. "Alan Titchmarsh says it doesn't matter if your garden goes brown, it will soon perk up when it rains," says a spokeswoman. But since the hosepipe ban has been introduced because of a shortage of rain, this argument seems a little circuitous. The brown-is-beautiful spokeswoman also refers me to the advice section of Thames Water's website, which is full of warnings on the evil of power showers but of less value to distressed

    View Document »

    The Wisdom Paradox

    4087 words, 17 pages

    “The Wisdom Paradox” (Goldberg, 2005) is a fascinating book about the biology of cognitive wisdom, including its unique costs and benefits. This book provides a thorough explanation of how people in later stages of life successfully undertake major cognitive tasks, as well as how this aptitude can be maximized. With vigorous and life-long mental activity in novel tasks learning new information, an aging person can gain wisdom and minimize clinical brain injury. Wisdom has intellectual, practical, moral, and spiritual facets. It can be defined as extensive pattern recognition of new informati

    View Document »

    Christian Ethics In A Postmodern World

    7459 words, 30 pages

    CHRISTIAN ETHICS IN A POSTMODERN WORLD The Rise of Postmodernity Since Federico de Onis’s use of the term ‘postmodernismo’ to describe the Spanish and Latin-American poetry of 1905-1914 which had reacted against the ‘excess’ of modernism in 1934, (Rose 1991: 171) “Postmodernism” became very popular. It has been used in the fields of art (Christo-Bakargiev 1987), architecture (Pevsner 1967), literature (Hassan 1971), video, economics, films (James 1991), ideology (Larrain 1994: 90-118), theology (Tilley at al 1995), and philosophy (Griffin et al 1993). In trying to understand ‘postmode

    View Document »

More Popular Essays

Research help is just moments away!