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Chapter 9: The Origins Chapter 9: The Origins of Genetics of Genetics

Chapter 9: The Origins of Genetics. Probability Likelihood that a specific event will occur Likelihood that a specific event will occur Can be expressed

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Page 1: Chapter 9: The Origins of Genetics. Probability Likelihood that a specific event will occur Likelihood that a specific event will occur Can be expressed

Chapter 9: The Origins of Chapter 9: The Origins of GeneticsGenetics

Page 2: Chapter 9: The Origins of Genetics. Probability Likelihood that a specific event will occur Likelihood that a specific event will occur Can be expressed

ProbabilityProbability

Likelihood that a specific event will Likelihood that a specific event will occuroccur

Can be expressed in words, Can be expressed in words, decimals, percentages, and fractionsdecimals, percentages, and fractions

Equation for probability:Equation for probability: Number of one kind of possible outcomeNumber of one kind of possible outcome

Total number of all Total number of all possible out comespossible out comes

Page 3: Chapter 9: The Origins of Genetics. Probability Likelihood that a specific event will occur Likelihood that a specific event will occur Can be expressed
Page 4: Chapter 9: The Origins of Genetics. Probability Likelihood that a specific event will occur Likelihood that a specific event will occur Can be expressed

ExamplesExamples

Page 5: Chapter 9: The Origins of Genetics. Probability Likelihood that a specific event will occur Likelihood that a specific event will occur Can be expressed

Mendel: The man, the Mendel: The man, the myth , the legendmyth , the legend

Page 6: Chapter 9: The Origins of Genetics. Probability Likelihood that a specific event will occur Likelihood that a specific event will occur Can be expressed

Why Use A Pea Plant?Why Use A Pea Plant?

Page 7: Chapter 9: The Origins of Genetics. Probability Likelihood that a specific event will occur Likelihood that a specific event will occur Can be expressed
Page 8: Chapter 9: The Origins of Genetics. Probability Likelihood that a specific event will occur Likelihood that a specific event will occur Can be expressed

Traits Are Expressed As Simple Traits Are Expressed As Simple RatiosRatios

Monohybrid crossesMonohybrid crosses

Experiments:Experiments:

Page 9: Chapter 9: The Origins of Genetics. Probability Likelihood that a specific event will occur Likelihood that a specific event will occur Can be expressed
Page 10: Chapter 9: The Origins of Genetics. Probability Likelihood that a specific event will occur Likelihood that a specific event will occur Can be expressed

What Did Mendel Observe?What Did Mendel Observe?

Page 11: Chapter 9: The Origins of Genetics. Probability Likelihood that a specific event will occur Likelihood that a specific event will occur Can be expressed
Page 12: Chapter 9: The Origins of Genetics. Probability Likelihood that a specific event will occur Likelihood that a specific event will occur Can be expressed

Law of Multiplication and Law Law of Multiplication and Law of Additionof Addition

Page 13: Chapter 9: The Origins of Genetics. Probability Likelihood that a specific event will occur Likelihood that a specific event will occur Can be expressed

Probability of a Specific Allele Probability of a Specific Allele in a Gametein a Gamete

Ex: A pea plant has two alleles for Ex: A pea plant has two alleles for seed color: one is for yellow and one seed color: one is for yellow and one is for greenis for green What is the probability that that the What is the probability that that the

gamete will carry the allele for green gamete will carry the allele for green seed color? Yellow seed color?seed color? Yellow seed color?