Prokaryotic Gene Regulation

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Presentation transcript:

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

E. Coli and the Lac Operon Only turns on lac operon when needed

Promoters and Operators Promoter- helps RNA polymerase to bind to DNA Operator- site where a repressor can bind

Eukaryotic Gene Regulation Transcription factors- control expression of genes Why so complex? Cell specialization

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

Gene Regulation and Development Early in life certain genes turned on and off Allows for differentiation What is this again?

Homeotic Genes Regulation of what develops where Homeobox genes Code for transcription factors that control developmental genes

Sex Chromosomes Determine gender of individual XX= Female, XY= Male Autosomes- other chromosomes

Sex-linked Inheritance Genes can be carried on the sex chromosomes Sex-linked disorders Adrenoleukodystrophy Hemophilia Color-blindness Duchennes Muscular dystrophy

Sex-linked Punnett square

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