Models for Embryonic Periodicity

Name: Models for Embryonic Periodicity
Price: 5.7 USD
Availability: InStock
ISBN: 9783805560085

ISBN-10: 3805560087

ISBN-13: 9783805560085

Edition: 3rd

Authors: L. I. Held, H. W. Sauer

List price: $35.00

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Description:

Spatially periodic patterns like zebra stripes or insect segments are mysteriously precise. How do they form during development? The deeper question, which lies at the heart of developmental biology, is: How do cells in different places within an embryo acquire different states of gene expression? In principle, there are three possible answers: either a cell's position causes its state, or its state causes its position, or both are caused by some third agent. These alternatives provide a framework for classifying theoretical models. Positional information models, the most widely used today, belong to the first category. Dozens of rival schemes have been proposed, but until now many have…

Book details

List price: $35.00
Edition: 3rd
Publisher: S. Karger AG
Publication date: 6/30/1998
Binding: Paperback
Pages: 120
Size: 6.00" wide x 8.75" long x 0.50" tall
Weight: 0.484
Language: English



Preface


Introduction


Periodicity


Types of Patterning Mechanisms



Positional Information Mechanisms


The Gradient Model


The Polar Coordinate Model


The Progress Zone Model


Puzzles and Paradoxes



Prepattern Mechanisms


Models Involving Physical Forces


Reaction-Diffusion Models


Induction Across Layers


Prepatterns vs. Positional Information


Hybrid Models



Determination Wave Mechanisms


Chemical Waves


Cellular Automata


The Sequential Induction Model


The Clock-and-Wavefront Model


Inhibitory Field Models



Darwinian Mechanisms


Cell Death Models


State-Change Models



Rearrangement Mechanisms


Adhesion Models


Repulsion Models


Interdigitation Models


Chemotaxis Models



Cell-Lineage Mechanisms


The Quantal Mitosis Model


The Stem Cell Model


L-Systems and Fractal Geometry


The Cortical Inheritance Model



The Computer Metaphor in Developmental Biology


Local vs. Global Information


Binary Codes and Boolean Logic


Default States


Linguistic Hierarchies


Stent's Cat, Brenner's Virus, and the 'Homeobox Homunculi'


Subroutines and Modules


Iteration and Halt Conditions


Input-Output, 'Morphospaces', and Evolutionary Constraints


Game Theory


References