Chapter 6 and 7 - Heredity and Mendelian Genetics Be able...

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Heredity and Mendelian Genetics Be able to describe the experiments that Gregor Mendel conducted. Understand how the results of those experiments allowed him to formulate the principles of segregation and independent assortment. Understand what is meant by the term traits and alleles. Understand what it means to be diploid. Understand how alleles for a particular trait may different and interact with each other to determine the physical characteristics of an organism.
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Heredity and Mendelian Genetics Given information regarding dominance and recessiveness for the alleles of a particular trait, you should be able to determine an organism’s phenotype and genotype. Understand the chromosome theory of inheritance. Be able to explain why the genes for certain traits are linked and usually inherited as a group. Understand what occurs during crossing- over and how this phenomenon allowed for the determination of the loci of genes relative to one another on the chromosome.
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Heredity and Mendelian Genetics Given the genotypes of two organisms, be able to determine the possible outcomes of a monohybrid and dihybrid cross. Understand why the 3:1 and 9:3:3:1 ratios of phenotypes are observed in a monohybrid and dihybrid cross. Understand how sex is determined in humans and for the male, why genes located on the X- chromosome are not inherited in a Mendelian fashion.
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Heredity Why are certain traits passed from parents to child? Genetics science of heredity and genetic variation
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Gregor Mendel Monk Experimented with garden vegetables 34 varieties of self-fertilizing peas Grown for several generations Father of modern genetics Mid-1800s
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Gregor Mendel Crossbred different pea plants Hybrid plants Offspring of two genetically dissimilar parents True breeding plants Offspring and parents have similar appearances Mid-1800s
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Gregor Mendel Crossbred different pea plants Studied 7 characteristics -Seed color -Seed shape -Flower color -Pod color -Pod form -Flower position -Stem length Mid-1800s
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Mendelian Genetics Single letters to represent each characteristic -Capital letter = dominant trait -lowercase letter = recessive trait Punnett square Phenotype Genotype
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Mendelian Genetics Experiment 1 Cross plants – white and purple flowers Monohybrid cross Outcome (F1 Generation) Progeny? Thought progeny exhibit blend of parents’ characteristics
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Mendelian Genetics Experiment 2 Grew plants from progeny seeds Outcome (F2 Generation) Purple flowers outnumbered white flowers
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Mendelian Genetics Experiment 3 Grew plants from progeny seeds of all purple flowers and from the progeny seeds of the white flowers Outcome: BB x bb: All flowers purple BB x Bb: All flowers purple Bb x bb: Half purple, half white Bb x Bb: 3 purple, 1 white BB x BB: All purple bb x bb: All white Conclusions
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This note was uploaded on 12/07/2009 for the course BIO 101 taught by Professor Don during the Fall '09 term at Ivy Tech Community College.

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Chapter 6 and 7 - Heredity and Mendelian Genetics Be able...

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