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OUTLINE 17 VII. Mutation A. Point Mutations 1. Substitution 2. Insertion 3. Deletion B. Causes of Mutation C. Consequences of Mutation 1. Beneficial 2. Neutral 3. Deleterious 4. Lethal 5. Heritable D. Frequency of Mutations E. Examples F. Chromosomal abnormalities 1. Chromosome breakage 2. Aneuploidy and non-disjunction
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Phenotypic plasticity in Daphnia Predator absent Predator present
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Crayfish predator Sunfish predator Snail prey
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A snail raised with fish A full sib raised with crayfish Phenotypic plasticity in shell morphology in Physis
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Phenotypic plasticity in leaf morphology in Viola
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The genetic code
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THE BIG CAT ATE THE RED EGG THB IGC ATA TET HER EDE GG. … Consequences of a frame shift mutation:
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X PKU disease - an autosomal recessive trait
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Albinism
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Sickle cellNormal red blood cell Sickle cell anemia: an autosomal co-dominant
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Fig. 15.11: Non-disjunction leading to aneuploid gametes
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Turner’s syndrome XO
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Klinefelter’s syndrome XXY
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XYY Male
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Cri du chat
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Attached earlobeFree earlobe = male = female Fig 14.14 Use of pedigree analysis = attached ff Ff OR FF Ff
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Sex chromatin: Barr body
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