3 9 Review

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3 9 Review

  1. 1. Launch <ul><li>What is the ratio of a diploid cell to a human cell in a human? In a cow with 26 chromosomes? </li></ul><ul><li>How many phenotypes can be produced from the following cross? AABbcc x AaBBCC </li></ul>
  2. 2. Mendelian Genetics, Review 9 March 2010
  3. 3. Our Goals <ul><li>80% Class Averages </li></ul><ul><ul><ul><li>Class Celebrations for every block that makes it </li></ul></ul></ul><ul><li>Each individual will score at least one grade higher on the unit exam than their mock quiz </li></ul><ul><ul><li>High fliers list for everyone who scores 80% or higher </li></ul></ul>
  4. 4. Molecular Genetics <ul><li>Molecular Genetics is the study of how DNA is changed into workable substances that control our bodies </li></ul>
  5. 5. Mendelian Genetics <ul><li>Mendelian Genetics is the study of how we inherit DNA from our parents </li></ul>
  6. 6. Vocab <ul><li>Genotype </li></ul><ul><ul><li>A genotype is how we write combination of alleles from each parent </li></ul></ul><ul><ul><ul><li>Aa, AA, aa </li></ul></ul></ul><ul><li>Phenotype </li></ul><ul><ul><li>The physical traits that the genotype produces </li></ul></ul><ul><ul><ul><li>Long fingers, brown hair, widow’s peak </li></ul></ul></ul>
  7. 7. Vocab <ul><li>Dominant </li></ul><ul><ul><li>Dominant traits only require one allele to present </li></ul></ul><ul><ul><li>They are able to hide the recessive allele </li></ul></ul><ul><ul><ul><li>AA, Aa </li></ul></ul></ul><ul><li>Recessive </li></ul><ul><ul><li>Recessive traits require two alleles to be present </li></ul></ul>
  8. 8. Vocab <ul><li>Homozygous </li></ul><ul><ul><li>Homozygous individuals receive the same allele from both parents </li></ul></ul><ul><ul><ul><li>AA, aa, BB, bb, CC, cc </li></ul></ul></ul><ul><li>Heterozygous </li></ul><ul><ul><li>Homozygous individuals receive a different allele from each parent </li></ul></ul><ul><ul><ul><li>Aa, Bb, Cc </li></ul></ul></ul>
  9. 9. CFU
  10. 10. Calculating Probability <ul><li>For genotype, </li></ul><ul><ul><li>Determine which individuals have a dominant allele or a recessive allele </li></ul></ul><ul><ul><ul><li>For the dominant individuals, determine if they are homozygous or heterozygous </li></ul></ul></ul><ul><li>Write the ratio as follows: </li></ul><ul><li>Homozygous Dominant : Heterozygous : Homozygous Recessive </li></ul>
  11. 11. Calculating Probability <ul><li>For phenotype, </li></ul><ul><ul><li>Determine which individuals have a dominant allele or a recessive allele </li></ul></ul><ul><li>Write the ratio as follows: </li></ul><ul><li>Dominant phenotype : Recessive phenotype </li></ul>
  12. 12. CFU
  13. 13. Determining genotype from offspring <ul><li>Steps: </li></ul><ul><ul><li>Determine known phenotypes and genotypes </li></ul></ul><ul><ul><li>Establish ratio of dominant to recessive phenotypes </li></ul></ul><ul><ul><li>Fill in punnett with known genotypes </li></ul></ul><ul><ul><li>Complete the rest of the punnett square by filling in the missing pieces </li></ul></ul>
  14. 14. Determining genotype from offspring <ul><li>Multiple crosses between the same male black hamster and female brown hamster produce a total of 12 brown and 14 black hamsters. If black is dominant and brown is recessive, what are the most likely genotypes of the parents? </li></ul><ul><li>Determine known phenotypes and genotypes </li></ul>
  15. 15. Determining genotype from offspring <ul><li>Multiple crosses between the same male black hamster and female brown hamster produce a total of 12 brown and 14 black hamsters. If black is dominant and brown is recessive, what are the most likely genotypes of the parents? </li></ul><ul><li>Establish ratio of dominant to recessive </li></ul>
  16. 16. Determining genotype from offspring <ul><li>Multiple crosses between the same male black hamster and female brown hamster produce a total of 12 brown and 14 black hamsters. If black is dominant and brown is recessive, what are the most likely genotypes of the parents? </li></ul><ul><li>Fill in punnett with known genotypes </li></ul>
  17. 17. Determining genotype from offspring <ul><li>Multiple crosses between the same male black hamster and female brown hamster produce a total of 12 brown and 14 black hamsters. If black is dominant and brown is recessive, what are the most likely genotypes of the parents? </li></ul><ul><li>Fill in the rest of the punnett square </li></ul>

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