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Genetics:mendel powerpoint
 

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