Meiosis Modeling Activity Essay

Background InformationMeiosis is the process by which eukaryotic organisms produce egg and sperm having half the brokertic information (haploid) of the another(prenominal) cadreular telephones in the organisms body (diploid). You will notice approximately similarities to mitosis but some definite differences in light reflex that result in genetic diversity in the gametes as well as the payoff formed by the tear downtual fusion of the egg and sperm.Two of the closely noted differences in meiosis ar that 1) there ar 2 complete divisions resulting in four daughter cells and, 2) meiosis has miscegenation everywhere, an even that occurs in Prophase I that increases genetic variation in the gametes. hybridisation over occurs between homologous chromosomes. These ar the pairs of chromosomes in an organisms body that carry genes for the alike trait located at identical positions on the two chromosomes. plane though they carry the same gene they may, however, possess different alleles for the gene which result in different forms of the trait.Pre-Lab1. Draw a tetrad in the space below and testing groundel the following centromeres, sister chromatids, homologous chromosomes.2. What are the two particles of meiosis that add variation to our population? (Hint one occurs in prophase I and the other in metaphase I).3. Which of the chromosomes 2-5 could be homologous with chromosome 1? formulate your answer. I think number 5 beca enjoyment it is the exact same as 1.Lab1. First view the recording on my message wit under Supplemental Learning Materials for this lab. You will need the code lyric poem from the recording for one of your conclusion questions. Link to recordinghttp//www.connectionslivelesson.com/p2fwrdno8yk/ 2. After you acquire viewed the recording, gather your required materials. You will need 4 forks, 4 knives, 4 spoons, 6 rubber bands, and some twine or string to use as cell membrane. If you can have two different types of silver grey that w ould be best (for example 2 forks, 2 knives, and 2 spoons that are different than the other set of 2 forks, 2 knives, and 2 spoons). 3. Your pose cell consists of 6 chromosomes (3 homologous pairs). engage the string to form the cell membrane for your cell(s). Begin with two forks, two knives, and two spoons (one of individually from to distributively one set) inside your string cell membrane as shown in the recording. sound through each of the steps of meiosis using your flatware chromosomes. Use the textbook pages 324-325 for help. PhaseModelingInterphaseReplicate the DNA of your chromosomes by adding a second fork, knife, or spoon to each existing fork, knife, and spoon. Hold each pair of chromatids together with a rubber band (centromere). Prophase I take a crap tetrads (XX) by pairing homologous chromosomes (set them next to each other). Model crossing over as best you can habituated the precedent we are using. Metaphase ILine up your tetrads along the metaphase plate. Model independent assortment. Anaphase IMove the homologous chromosomes to opposite ends of the cell. Telophase IYou should have three chromosomes, knife, fork, and spoon, (each represent of two chromatids) in each of your two nuclei. Cytokinesis IDivide your cell membrane so that you have two daughter cells (two string circles for cells). Prophase IICheck to make sure that each of your two cells contains three chromosomes make up of sister chromatids. Metaphase IILine your chromosomes up along the nerve center of each of your cells. Anaphase IISeparate your sister chromatids (remove rubber band retention them together). Move one sister chromatid from each chromosome to opposite sides of your cell. Telophase IIYou should in a flash have four nuclei, with three single chromosomes in each of thecells. Cytokinesis IIDivide your cell membranes so that you have four daughter cells (use more than string).DataTake 3 photos or create 3 drawings of your model as it looked in 3 different stages of meiosis as exposit in the table above. Indicate which stage of meiosis is shown in each photo/drawing. Include the photos or a scan of the sketches when you upload your lab to the drop box.Conclusion (6 points)1. List the two code words that were given in the lab recording found on my message board.Chromosomes and bandaging2. Does mitosis more closely resemble meiosis I or meiosis II? Explain your answer.More like Meiosis I because it only if made two cells.3. What is crossing over? When does it occur during meiosis? why did you have difficulty modeling this element of meiosis using your chromosomes?Crossing over is the process in which homologous chromosomes exchange portions of their chromatids during meiosis. It occurs during prophase I. I had a hard time because you cant really change the chromosomes so it was difficult to show.4. Think about your modeling. Visually, what is the major difference between the detachment of chromosomes between anaphase I and anaphase IIThere were four to separate so just two.5. What is independent assortment? When does it occur during meiosis? Howdid you model this element of meiosis?6. Which part of meiosis, meiosis I or meiosis II, is responsible for(p) for reducing the chromosome number by half in the cell? miosis II