Genetics:mendel powerpoint
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Genetics:mendel powerpoint Genetics:mendel powerpoint Presentation Transcript

  • Mendel’s Laws of Heredity
    • Ch 10.1
  • What is heredity?
    • The passing on of characteristices from parents to offspring.
    • Genetics is the branch of biology that studies heredity
    • the characteristics that are inherited are traits.
    • Mendel was the first person to success in predicting how traits would be transferred from one generation to the next.
  • Medels Subject
    • He chose pea plants, which reproduce sexually, which means they have two distince sex cells, male and female.
    • sex cells are called gametes.
    • the transfer of male pollen grains to the pistil of a flower is called pollination
    • the uniting of male and female gametes is called fertilization
  • Crosses
    • A hybrid is the offspring of parents that have different forms of a trait, such as tall and short.
    • Mendel first did monohybrid crosses, which means he was looking at only one trait.
  • Mendel’s crosses
  • The rule of dominance
  • the law of segregation
  • phenotype
    • the way an organism looks and behaves is called it’s phenotype.
      • example: what color are your eyes, or your hair?
      • what you see is the phenotype.
  • Genotype
    • the gene combination an organisms contains is known as genotype.
  • homozygous vs heterozygous
    • an organism that is homozygous for a trait has two alleles for the trait that are the same.
    • an organism that is heterozygous for a trait has two different alleles (dominant and recessive).
  • punnett square
    • punnett sqaures are used to predict what possible offspring may be.
  • dihybrid cross
  • sources
    • http://www.glencoe.com/qe/images/b136/q4315/ch10_0_h.gif
    • http://www.ck12.org/flexr/chapter/1805/
    • http://www.tutorvista.com/biology/dihybrid-cross-calculator