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Learning Goal 1 The Work of Gregor Mendel <ul><li>Background on Gregor Mendel </li></ul><ul><li>  Details - </li></ul><ul>...
Unit IV Learning Goal 1 Describe the research of Gregor Mendel and predict the outcome of genetic crosses.
Background on Gregor Mendel <ul><li>Details </li></ul><ul><li>Austrian monk with an interest in gardening and a good knowl...
Reasons for Choosing the Garden Pea <ul><li>Many varieties exist. </li></ul><ul><li>Easy to observe contrasting traits. </...
Mendel’s Experimental Design <ul><li>His Pea Experiment </li></ul><ul><li>He allowed each variety to self-pollinate for se...
Mendel’s Results <ul><li>For every trait, one form would disappear from the F 1  generation. </li></ul><ul><li>The disappe...
Mendel’s Laws <ul><li>Law of Dominance  –  </li></ul><ul><li>One form of each trait is dominant and one is recessive. </li...
Law of Segregation  <ul><li>Members of each gene pair (alleles) separate during gamete formation ( meiosis ). </li></ul>
Law of Independent Assortment <ul><li>The genes for different traits separate independently from one another during gamete...
Genetic Terms <ul><li>Alleles – members of a gene pair symbolized by letters. Dominant alleles are capital letters, and re...
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Learning goal 2

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Learning goal 2

  1. 1. Learning Goal 1 The Work of Gregor Mendel <ul><li>Background on Gregor Mendel </li></ul><ul><li> Details - </li></ul><ul><li> Reasons for Choosing Peas - </li></ul><ul><li>Mendel’s Experimental Design </li></ul><ul><li> His Pea Experiment - </li></ul><ul><li> Mendel’s Results - </li></ul><ul><li>Mendel’s Laws </li></ul><ul><li> Law of Dominance - </li></ul><ul><li> Law of Segregation - </li></ul><ul><li> Law of Independent Assortment - </li></ul><ul><li>Genetic Terms </li></ul><ul><li> Alleles - </li></ul><ul><li> Homozygous - </li></ul><ul><li> Heterozygous - </li></ul><ul><li> Genotype - </li></ul><ul><li> Phenotype - </li></ul>
  2. 2. Unit IV Learning Goal 1 Describe the research of Gregor Mendel and predict the outcome of genetic crosses.
  3. 3. Background on Gregor Mendel <ul><li>Details </li></ul><ul><li>Austrian monk with an interest in gardening and a good knowledge of mathematics. </li></ul><ul><li>In the 1840’s he experimented with the traits of garden peas (Pisum sativum). </li></ul>
  4. 4. Reasons for Choosing the Garden Pea <ul><li>Many varieties exist. </li></ul><ul><li>Easy to observe contrasting traits. </li></ul><ul><li>They self-pollinate. </li></ul><ul><li>They reproduce quickly. </li></ul>
  5. 5. Mendel’s Experimental Design <ul><li>His Pea Experiment </li></ul><ul><li>He allowed each variety to self-pollinate for several generations to ensure that they were true-breeding (offspring always exhibited the same trait). He called this the P 1 (parent) Generation. </li></ul><ul><li>He took two of these parent plants with contrasting forms of the same trait and cross-pollinated them. </li></ul><ul><li>The plants that resulted from this cross were called the F 1 Generation. </li></ul><ul><li>Mendel then allowed the F 1 plants to self-pollinate to produce the F 2 Generation. </li></ul>
  6. 6. Mendel’s Results <ul><li>For every trait, one form would disappear from the F 1 generation. </li></ul><ul><li>The disappearing trait reappeared in the ¼ of the F 2 generation. </li></ul><ul><li>This was true of all seven traits that Mendel looked at. </li></ul><ul><li>He used the term dominant to refer to the form of the trait exhibited in the F 1 generation and recessive to refer to the disappearing trait. </li></ul>
  7. 7. Mendel’s Laws <ul><li>Law of Dominance – </li></ul><ul><li>One form of each trait is dominant and one is recessive. </li></ul>
  8. 8. Law of Segregation <ul><li>Members of each gene pair (alleles) separate during gamete formation ( meiosis ). </li></ul>
  9. 9. Law of Independent Assortment <ul><li>The genes for different traits separate independently from one another during gamete formation. </li></ul>
  10. 10. Genetic Terms <ul><li>Alleles – members of a gene pair symbolized by letters. Dominant alleles are capital letters, and recessive alleles are lower case. </li></ul><ul><li>Homozygous – the alleles of a gene pair are identical (RR or rr). </li></ul><ul><li>Heterozygous – the alleles of a gene pair are different (Rr). </li></ul><ul><li>Genotype – describes the types of alleles of a gene pair </li></ul><ul><li>Phenotype – describes the expression of the trait in the appearance. </li></ul>

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