chapter 21 - development evo-devo chick embryo human embryo...

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1 development evo-devo chick embryo human embryo Cell division Stages of development Morphogenesis Cell differentiation Animal development Zygote (fertilized egg) Eight cells Blastula (cross section) Gastrula (cross section) Adult animal (sea star) Cell movement Gut Cell division Stages of development Morphogenesis Cell differentiation Animal development Zygote (fertilized egg) Eight cells Blastula (cross section) Gastrula (cross section) Adult animal (sea star) Cell movement Gut Cell division Stages of development Morphogenesis Cell differentiation Seed leaves Shoot apical meristem Root apical meristem Plant Embryo inside seed Two cells Zygote (fertilized egg) Plant development Model organisms for studies of evo-devo
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2 Comparative genome sizes organism estimated size estimated gene number average gene density chromosome number Homo sapiens (human) 2900 mil ion bases ~30,000 1 gene per 100,000 bases 46 Rattus norvegicus (rat) 2,750 mil ion bases ~30,000 1 gene per 100,000 bases 42 Mus musculus (mouse) 2500 mil ion bases ~30,000 1 gene per 100,000 bases 40 Drosophila melanogaster (fruit fly) 180 mil ion bases 13,600 1 gene per 9,000 bases 8 Genome size does not cor elate with evolutionary status, nor is the number of genes proportionate with genome size Arabidopsis thaliana (plant) 125 mil ion bases 25,500 1 gene per 4000 bases 10 Caenorhabditis elegans (roundworm) 97 mil ion bases 19,100 1 gene per 5000 bases 12 Saccharomyces cerevisiae (yeast) 12 mil ion bases 6300 1 gene per 2000 bases 32 Escherichia coli (bacteria) 4.7 mil ion bases 3200 1 gene per 1400 bases 1 H. influenzae (bacteria) 1.8 mil ion bases 1700 1 gene per 1000 bases 1 Human Genome Project http://www.ornl.gov/sci/techresources/Human_Genome/faq/compgen.shtml Cell division Morphogenesis Cell differentiation Æ one week of development Æ Fertilized egg of a frog Tadpole hatching from egg Can a differentiated
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This note was uploaded on 04/16/2008 for the course BIO 131 taught by Professor Paz y mino during the Fall '08 term at UMass Dartmouth.

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chapter 21 - development evo-devo chick embryo human embryo...

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