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ch13 - CH 13 Part 1 Mendel and the gene OUTLINE I Lots of...

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CH 13 Part 1: Mendel and the gene OUTLINE I. Lots of vocab II. Mendel’s experiments & model III. Predicting genotypes & phenotypes Chromosome theory of inheritance- meiosis causes patterns of inheritance caused by genes on chromosomes
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Gene : DNA nucleotide sequence of hereditary information Locus: particular site where a gene is found on a chromosome Allele: an alternative form of a gene SOME VOCAB P a B Modified from Figure 9.9 P a b Alleles Gene Loci
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Dominant allele: in a heterozygous individual, the allele that determines the phenotype with respect to a certain gene Recessive allele: in a heterozygous individual, the allele that has no noticeable effect on the phenotype Heterozygous: having 2 different alleles for a given gene Homozygous: having 2 identical alleles for a given gene SOME MORE VOCAB P a B Dominant allele P a b Recessive allele Modified from Figure 9.9 Homozygous for the dominant allele Homozygous for the Recessive allele Heterozygous
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Phynotype : the expressed traits of an organism Genotype : the genetic makeup of an organism EVEN MORE VOCAB P a B P a b PP aa Bb Modified from Figure 9.9 Flower color Flower position Seed shape
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Figure 8.14 Homologous pair of duplicated chromosomes Interphase before meiosis Chromosomes duplicate 1 2 3 Homologous chromosomes separate Sister chromatids separate CH12 REVIEW
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Various traits exist in organisms - usually inherited in particular patterns… Patterns of inheritance (heredity) = transmission of traits from parents to offspring PATTERN
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Gregor Mendel (1865) Q: Why do offspring resemble parents and how does transmission of traits (Characteristics) occur? Studied peas Analyzed patterns of inheritance Deduced the fundamental principles of genetics = biology branch that studies the inheritance of traits
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The Genetic Experiments of Gregor Mendel Crosses between true breeding lines of common garden peas that differed by 1 trait.
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