Lecture 4 - Jan 20, 2010

Lecture 4 - Jan 20, 2010 - Rules of probability apply to...

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Rules of probability apply to genes The multiplication rule
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Rules of probability apply to genes The addition rule Probability of phenotype (Heads) = ¼ + ¼ + ¼ = ¾
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Probability caculations in genetics ¼ ¼ ¼ ¼ ¼ ¼ ¼ ¼
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CLICKER QUESTION ¼ ¼ ¼ ¼ ¼ ¼ ¼ ¼ To calculate the probability of the genotype in each Punnett squre box, you would use the… A.Addition rule (½) B.Multiplication rule (1/16)
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CLICKER QUESTION ¼ ¼ ¼ ¼ ¼ ¼ ¼ ¼ The probability of getting spherical green seeds is A.Calculated using the multiplication rule to be 1/48 B.Calculated using the addition rule to be 3/16
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Human Pedigree Analysis Huntington Disease
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Human Pedigree Analysis Albinism
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10.2 How Do Alleles Interact? Wild type : allele present in most of the population. Mutant alleles: Alleles other than wild type. Arise through mutation . Locus with wild-type allele present less than 99% of the time is polymorphic .
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Allele interaction Different allelic interactions: Multiple alleles Incomplete dominance Codominance Pleiotropic alleles
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Allele Interaction Multiple alleles C > C ch > c h > c
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Allele Interaction Incomplete dominance Example: snapdragons
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Lecture 4 - Jan 20, 2010 - Rules of probability apply to...

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