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Transcript

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