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Prokaryotic Gene Regulation
Proteins that bind to DNA can control transcription What does this allow for? Act as a light switch- turn genes on or off Operon- group of genes regulated together
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E. Coli and the Lac Operon
Only turns on lac operon when needed
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Promoters and Operators
Promoter- helps RNA polymerase to bind to DNA Operator- site where a repressor can bind
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Eukaryotic Gene Regulation
Transcription factors- control expression of genes Why so complex? Cell specialization
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Daily Warm-Up Jan. 10th How many chromosomes do humans have?
HW: Read 13.4 Begin working on Punnett squares Study for quiz on Monday Turn in: Lorenzo’s Oil movie sheet if haven’t already
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Gene Regulation and Development
Early in life certain genes turned on and off Allows for differentiation What is this again?
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Homeotic Genes Regulation of what develops where Homeobox genes
Code for transcription factors that control developmental genes
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Sex Chromosomes Determine gender of individual XX= Female, XY= Male
Autosomes- other chromosomes
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Sex-linked Inheritance
Genes can be carried on the sex chromosomes Sex-linked disorders Adrenoleukodystrophy Hemophilia Color-blindness Duchennes Muscular dystrophy
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Sex-linked Punnett square
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