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4 Chapter11 4 Chapter11 Presentation Transcript

  • Chapter 11 Introduction to Genetics Julianna Archacki Alexandria Tsang
  • 11-1 The Work of Gregor Mendel
    • Gregor Mendel’s peas
    • Genes and Dominance
    • A trait like seed color or plant height.
    • The offspring of crosses between parents
    • with different traits is hybrid .
    • Segregation is separation of alleles during gamete formation.
    • Gamete is a cell involved in sexual reproduction .
  • 11-2 Probability and Punnett Squares
    • Genetics and probability
    • Probability can be used to measure the outcome of genetic crosses.
    • Punnett Squares
    • BB,bb is Homozygous.
    • Bb is Heterozygous.
    • All the tall plants have the same Phenotype .
    • Genotype is genetic makeup of an organism.
  • 11-3 Exploring Mendelian Genetics
    • Independent Assortment
    • The genes for different traits can segregate independently during the formation of gametes.
    • Incomplete Dominance
    • One allele is not completely dominant over another.
    • Codominance
    • Both alleles give to the phenotype of the organism.
    • Multiple Alleles means genes more than 2 alleles then others.
    • Polygentic Traits means traits controlled by 2 or more genes. Many traits are made by the interaction of different genes.
  • 11-4 Meiosis
    • Meiosis is a process of reduction
    • division in which the number of
    • chromosomes per cell is cut
    • in half through the separation
    • of homologous chromosomes
    • in a diploid cell.
  • 11-5 Linkage and Gene Maps
    • The chromosomes assort independently; individual genes do not.