'Homeotic genes' diaporamas de présentation

flymove.uni-muenster.de/Processes/Segmentation/SegmentGes.html

http://flymove.uni-muenster.de/Processes/Segmentation/SegmentGes.html. wg. WT. Mirror image duplication. A>. P. A>. P. A>. P. loss of P. <A. A>. A>. <A. WT. en. anterior. posterior. WT. en. http://flymove.uni-muenster.de/Processes/Segmentation/SegmentGes.html.

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Molecular and Organismal Development

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Morphogen gradient, cascade, signal transduction

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Morphogen gradient, cascade, signal transduction

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Chapter 22: Aging

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Chapter 22: Aging

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Morphogen gradient, cascade, signal transduction

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Animal Characteristics & Development CH21

Animal Characteristics & Development CH21. From Single Cell to Multicellular Organism. Animal Development.

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Flies are quick!

Flies are quick!. 3 head. The fly body plan: each segment has a unique identity and produces distinctive structures. 3 thorax. 8 abdomen. Model Organisms: Drosophila. small (adult < 5 mm long). Can keep hundreds in a small vial. short generation time - 8 days

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MOLECULAR REGULATION OF DEVELOPMENT GROWTH FACTOR SIGNALING, HOX GENES AND THE BODY PLAN

MOLECULAR REGULATION OF DEVELOPMENT GROWTH FACTOR SIGNALING, HOX GENES AND THE BODY PLAN. Overview. Pattern formation by morphogen gradients of growth factors and the dorsal-ventral (D-V) axis. B) Hox genes and the antero-posterior (A-P) axis. - colinearity

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Chapter 18 Organizing Information About Species

Chapter 18 Organizing Information About Species. The Hawaiian Honeycreepers. By 1778 at least 43 honeycreeper species that had thrived on the Hawaiian islands before humans arrived were extinct

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Lecture 3 De Robertis August 17, 2011

Lecture 3 De Robertis August 17, 2011. MOLECULAR REGULATION OF DEVELOPMENT GROWTH FACTOR SIGNALING, HOX GENES AND THE BODY PLAN. Two parts:. Pattern formation by morphogen gradients of growth factors and the dorsal-ventral (D-V) axis. BMP receptors.

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Ch 22 Introduction

Ch 22 Introduction. How does a single fertilized egg cell develop into an embryo and then into a baby and eventually an adult? A few fundamental principles are common to all developmental sequences observed in multicellular organisms. Shared Developmental Processes.

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Transvection

Transvection. Zygotic Gene Activity in Development. The differentiation of cell types and the formation of organs depend on genes being activated in particular spatial and temporal patterns. Zygotic Gene Expression.

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DNA and Gene Expression

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Day Date Reading Topic

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Drosophila melanogaster

Drosophila melanogaster. 2.5mm. Movie. The Life Cycle. 12 hr. 1-2 weeks. 36hr. 60 hr. 2 2 3 3 4 4. The Fly Genome. 3 autosomal pairs (2,3,4) Sex chromosomes XX, XY. 165Mb 14,000 genes 50% have a human homolog 61% of human disease genes have a fly counterpart.

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Human Hox genes 4 clusters Chr 1: 9 Hox genes Chr 7: 11 Chr 12: 9 Chr 17: 10

Mapping Hox gene sequences onto a phylogeny to see if gains and losses can explain arthropod diversity. 8 Hox genes in ancestor of bilaterally symmetrical animals. 4 clusters 39 Hox genes. Human Hox genes 4 clusters Chr 1: 9 Hox genes Chr 7: 11 Chr 12: 9 Chr 17: 10.

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9.35 Homeotic gene expression in Drosophila

9.35 Homeotic gene expression in Drosophila. After the parasegmental boundaries are set, the pair-rule and gap genes interact to regulate the homeotic selector genes, which determine the identity of each segment. Antennapedia complex: labial (lab), Deformed (dfd)- head

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