A Experiment Of Mendelian Genetics

There were two types of plants used. Both were of the same species, Brassica rapa but two of the plants contained rosette shaped complexes that were deficient in producing gibberellic acid compared to the wild-type plants. Therefore, they grew smaller and shorter as a phenotype. The Brassicaceae family includes cabbage, cauliflower, spinach, and many others. (

Mendel studied pea plants and how they passed along their genes. Plants that bore green peas that bred with other plants that had green peas had green offspring. Mendel would occasionally breed the green pea plants with plants that had yellow pea plants. The pea plants would only inherit one gene from one parent. If a plant produced more offspring, the chance for a green pea plant increased but most of the offspring would be yellow. This means that even though the dominant trait is more noticeable, the recessive trait was still contained inside the offspring. Evolution can occur based on the distribution of genes in a species population. "From what we know of the genetic nature of inheritance, it is also clear that evolutionary processes must entail changes in the genetic composition of populations" (Boyd and Silk

The Wisconsin fast plant also known as the Brassica rapa belongs to the crucifer family of plants, closely related to cabbages, turnips, broccoli and other vegetables. Brassica rapa plants are used because they are viewed as model organism, a species that has been widely studied and can be breed in a laboratory. It is an ideal model organism because it has a short growing process. About 2 weeks after the plant is planted it will began flowering, possessing the ability to produce seeds at high planting density, is categorized as a petite plant size, and lastly has the ability to grow under continuous fluorescent lighting in a standard potting mix. This plants make it easy to track the genetic information passed from generation to generation

In order to test this hypothesis and prediction, an experiment was conducted using a heterozygous F1 generation of Brassica Rapa seeds. The seeds were planted, pollinated, harvested (F2 generation) and germinated for observation. When leaves were visible, phenotypes (green vs. purple) were counted and recorded. The experiment took place over 13 weeks, spanning the full semester of General Biology Lab I. The sections that follow will detail the materials and methods used, the results of the investigation and an in-depth discussion of the outcomes.

He chose to study in detail the common garden pea, Pisum, which he grew in the monastery garden. During 1856 and 1863 Mendel tested his pea plants reaching a number of maybe 28,000 pea plants, carefully examining seven pairs of seeds for comparison, such as shape of seed, color of seed, tall stemmed and short stemmed and tall plants and short plants looking and the differences in the same plant. Johann Mendel worked on this for many years, carefully wrapping each individual plant to prevent accidental pollination by insects. He collected the seeds produced by the plants and studied these seeds observing that some plants. Johann Mendel discovered that by putting together tall and short parent plants he got hybrid result that resembled the tall parent rather than being a medium height blend. He explained his concept of heredity units, now called genes. These often referred to as dominant or recessive characteristics. He then figured out the pattern of inheritance of various and came up two generalizations that became known as the laws of heredity. Johann Mendel's observations led him to coin two terms, which are still used in present-day genetics: dominant and

Gregor Mendel, the father of genetics, discovered principles of inheritance through breeding peas of different color and texture. He crossed several types of peas to investigate dominance relationships, variability, and genetic probability. Through his experiments, he laid down the foundation of inheritance that geneticists use to this day (Griffiths, 2015). From these crosses, Mendel pioneered modern genetics by developing seven laws of inheritance. The first and second law are investigated in this experiment.

Fast plants were first routinely planted in Nepal by a farmer. Generations later, a plant explorer recognized them as brassica plants. She took seeds back to the United States and they were left untouched until a scientist was looking for a brassica plant in order to further study diseases that plagued plants of the same family, such as cabbage or broccoli. This scientist decided to use these Fast Plants because they had a much shorter life cycle than the other plant he was considering using (Williams). Instead of a year per each generation, fast plant’s life cycle is only thirty-five days long, as is seen from the image to the left. The plants usually are flowering in twelve to fourteen days (Wisconsin 1). A typical life cycle of fast plants is faster than other plants, contributing to its name “Fast Plants”. Typically, the cotyledon will appear within forty-eight to seventy-two hours, true leaves should form in four to nine days, and flowers will open in thirteen to seventeen days. By using Fast Plants, data is able to be collected quicker than if a traditional plant was to be used. However, in order to optimize growing time, certain conditions need to be met.

Introduction For this experiment, in my group we used the Wisconsin Fast Plant, which is also known as Brassica rapa. The Fast plant originated from the University of Wisconsin- Madison program from Professor Paul H. Williams. Fast Plant has a short life span that grows to about 40 days and can grow to be about 15 cm long.

The average height of the wild type Brassica rapa plants treated with gibberellic acid was 5.91 cm and was taller after 15 days of growth than the wild type Brassica rapa plants treated with water, which were 5.60

From both graphs, the plant with two pellets and six pellets of fertilizer grow faster than zero fertilizer and four fertilizers. Compare to the plant with two pellets and six pellets, the six pellets one grow faster than the plant with two pellets. The plant with four pellets grow slower than the plant with no fertilizer. However, the data doesn’t make sense, so it is unreliable. Also, it does not support the hypothesis. The reason why the data is wrong, is maybe because the Brassica rapa was extract in the first week for measuring the length. Neverthless, it was a wrong action.Therefore,

Gregor Mendel is usually known to be the father of modern genetics. But farmers already known for centuries that crossbreeding of animals and plants have favorable trait outcomes. Mendel’s pea plant experiments were conducted between 1856 to 1863 established many of the rules of heredity. Mendel did his experiments at the University of Vienna, Public university in Vienna, Austria.

The experiment commenced with planting over one hundred and thirty Brassica rapa plants. A large abundance was planted to ensure the large diversity of plants, which would also ensure a number of plants would be available to artificially select. Each Brassica rapa was planted with about one hundred and thirty plants to ensure the genetic diversity but this process first commenced by accumulating small plastic pots; it was important that these pots have holes in them so that they could be filled with wick. The small piece of wick would serve as a safety net for the Brassica rapas in case they do not receive water. The wick would temporarily keep the soil moist, so the plants would not immediately face peril. We also kept the soil moist

Gregor Mendel is known as the father of modern genetics because of the research and experiments he did by breeding pea plants and examining their physical appearances. He studied the plants seed color and shape, pod color and shape, and flower color and position. Mendel collected the seeds from pods produced after fertilizing two parent pea plants and then grew those seeds into new plants and observed how the offspring resembled or differed from the parents. After all of his experimentation, Mendel was able to conclude 3 principles. The principle of segregation, which meant that each organism has two alleles for each gene, one from each parent that separate

Labels were first made for Intraspecific and Interspecific for each plastic pot measuring 6cm by 6cm by 8.5cm. There was 10 pots filled ¾ of the way full, with Sta-Green™-moisture mixture plus wood fertilizer, for each of the twenty groups. For intraspecific a control was set with one Brassica rapa seed directly in the center of the pot. Then 2 Brassica rapa seeds were placed together equal distances apart into two pots. In another two pots, four Brassica rapa seeds were placed together equally apart. The last two pots had 8 Brassica rapa seeds equally apart. The Brassica rapa seeds used in this experiment are Wisconsin Fast Plant™. For the interspecific groups,the plastic pots were the same as above and each filled ¾ full of the same potting

The results of part B were also conclusive but were as to be expected with both plant sets increasing in mass. The original mass of a individual seed was 0.036 grams with the total mass being 0.3 grams. The plants in the dark had a 833.33% increase with the individual weight being 0.3 grams while the plants grown with light exposure individual mass of 0.4 grams and a 1111.11% increase.