Meiossis and Genetic Diversity in Sordaria Meiosis and Genetic Diversity in the Model Organism‚ Sordaria. By: Katie Fiorillo BIO110 Lab TA: Lauren Smith October 30‚ 2012 A. INTRODUCTION: In this lab‚ the organism Sordaria fimicola was used to explore factors contributing to genetic evolution of sexual reproduction. These organisms are found in “Evolution Canyons‚” which occur when two mountain slopes with very different climatic conditions congregate with a comparatively small valley
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Meiosis and Genetic Diversity in Sordaria 979554296 Biology 110 Lab Introduction: In Israel there exists multiple spots in the mountains called Evolution Canyons‚ which are all located between a southern facing slope (SFS) and a northern facing slope (NFS). What’s particularly interesting about these locations is that despite the two slopes being on opposite sides of a small canyon‚ they exhibit extremely contrasting conditions. The SFS receives multiple times the UV radiation from the sun
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Introduction: To achieve genetic experiments with haploid organisms‚ genetic strains of different genotypes must be crossed from one another. Following fertilization and meiosis‚ the meiotic products can be analyzed as the ascomycete fungus‚ Sordaria fimicola. Sordaria can be used as a model to study meiotic segregation. The trait followed was the ascospore color. Ascospore color is a single gene trait therefore it is easily observed under a light microspore. Which allele is dominant is very tough to say
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Nicole Hain Bio 110 Sordaria fimicola Lab Report Introduction “Evolution Canyon” consists of two slopes in Israel that are close in proximity‚ but have a huge difference in environment. This makes the slopes a good model system for exploring evolution‚ especially because they’re so close to one another. The South Facing Side (SFS) receives more sunlight than the North Facing Side (NFS). This extreme sun exposure causes the South slope to have drought and arid conditions whereas the North side has
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The lab experiment examined meiosis and genetic diversity through the model organism‚ Sordaria fimicola. Meiosis is part of the sexual life cycle and occurs in all sexually reproducing organisms. It is a method of cell division that produces gametes. Meiosis has two parts: meiosis I and meiosis II. Both parts undergo the same four stages of prophase‚ metaphase‚ anaphase‚ and telaphase. The process begins with one single parent diploid cell (that contain homologous chromosomes) that divides into
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Effects of Crossing Over in Sordaria fimicola Abstract Sexual reproduction in organisms is a cause for genetic variation. This can be seen through the process of meiosis in Sordaria fimicola because of the effects of crossing over and independent assortment that occur in meiosis I. Before performing this experiment we hypothesized that we would be able to see that crossing over did indeed occur in the S. fimicola. We tested our hypothesis by growing our own culture and observing it under a
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Genetic Variation in Sordaria Finicola Introduction: The purpose of the Sordaria Lab was to explore the affects of genetic variation caused by meiosis and to record how sexual reproduction] affects the amount of crossing over in certain strains of Sordaria Fimicola. These organisms are ascomycetes and are also known as sac fungi. This is because the shape of their asci is in the form of a sac; inside each sac there are structures called ascospores. It is these structures‚ ascospores‚ where genetic
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Biology 110 Fall 2012 section 30 October 2012 Sordaria Lab Meiosis and genetic diversity in the model organism‚ Sordaria Introduction Meiosis is a process in which a cell divides to form four haploid (1N) cells. The Sordaria lab is a perfect way to see an example of how meiosis impacts the life of an organism. Meiosis can be broken down into parts that contain a few stages. These stages are similar to that in Mitosis (Prophase‚ Metaphase‚ Anaphase‚ and telaphase.) during Meiosis I‚ crossing
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closely related to Neurospora and Podospora‚ is a member of the numerous class Pyrenomycetes or flask-fungi. The natural habitat of the three species of Sordaria that have been the principal subjects in genetic studies is the dung of herbivorous animals. The species S. fimicola is common and worldwide in distribution. The species of Sordaria are similar morphologically‚ producing black perithecia containing asci with eight dark ascospores in a linear arrangement. These species share a number
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…..Sordaria fimicola is fungus that may be used to show the results of crossing over during meiosis. Sordaria throughout most of its life is haploid‚ but becomes diploid after the fusion of two different types of nuclei‚ which forms a diploid nucleus (3). In Sordaria meiosis results in the making of eight haploid ascospores found in a sac called an ascus (1). Most asci are found in a perithecium. The life cycle of Sordaria fimicola begins as a spore is discharged
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