Genetics:mendel powerpoint

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Genetics:mendel powerpoint

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

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