Inheritance

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Inheritance

  1. 1. TERMINOLOGYInheritanceChromosomesGenesGametes (Meiosis)FertilizationMitosisPhenotypeGenotype Cont….
  2. 2. DominantRecessiveHomozygousHeterozygousMutationVariation: Continuous/Discontinuous
  3. 3. FATHER OF GENETICS 1.The principle of segregation 2.The principle of independent assortment
  4. 4. The seven traits that Mendel studied in ‘peas’ Recessive Dominant Expression: Trait: Expression:1. Form of ripe seed Smooth Wrinkled2. Color of seed albumen Yellow Green3. Color of seed coat Grey White4. Form of ripe pods Inflated Constricted5. Color of unripe pods Green Yellow6. Position of flowers Axial Terminal7. Length of stem Tall Dwarf
  5. 5. Segregation: for any particular trait, the pair of alleles of each parent separate and only one allele passes from each parent on to the offspring. This is segregation of alleles occuring during the process of sex cell formation (meiosis)Independent assortment: Different pairs of alleles are passed to offsprings independently of each other. The result is that new combinations of genes present in neither parent are possible.
  6. 6. SEGREGATION
  7. 7. INDEPENDENT ASSORTMENT Example of a Cross: Yellow seeds/Round seeds (GGWW) x green seeds/wrinkled seeds (ggww) Gamete formation: GW x gw F1 GgWw
  8. 8. INDEPENDENT ASSORTMENT Gw gW gw GW GW GGWW GGWw GgWW GgWw Gw GGWw GGww GgWw Ggww gW GgWW GgWw ggWW ggWw gw GgWw Ggww ggWw ggww
  9. 9. GENOTYPE & PHENOTYPE
  10. 10. CHARACTERISTICSINHERITEDTHROUGH DNA
  11. 11. STRUCTURE OF DNA

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