lec22 - Lecture 22 Maternal effect and epigenetic...

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Picture 141 Picture 139 Picture 138 Picture 140 Lecture 22 – Maternal effect and epigenetic inheritance I. Maternal effect A. snail shell coiling in  Limnaea peregra B. early  Drosophila  development genes C. maternal effect genes: summary - usually little or not transcription early in development - RNAs and proteins synthesized by mom, deposited in egg and function in early  development - phenotype depends on nuclear genotype of mom II. Extranuclear inheritance A. Some cytoplasmic organelles include their own genotypes B. Tend to show uniparental inheritance C. eg. Mitochondria 1
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1. mitochondrial function 2. small genome, encodes few genes for mitochondrial function, tRNA and rRNAs 3. most mitochondrial proteins encoded in nucleus 4. inherited from mother 5. sometimes mix of mutant and wild type 6. mitochondrial mutations tend to reduce ATP production 7. Example of mitochondrial inheritance
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This note was uploaded on 07/01/2011 for the course L 311 taught by Professor Forrester during the Fall '10 term at Indiana State University .

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lec22 - Lecture 22 Maternal effect and epigenetic...

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