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Developmental Biology - PowerPoint PPT Presentation


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Developmental Biology. An Introduction. Animal Development. How has the study of development changed?. Animal Development. What kinds of questions are developmental biologists asking?. Animal Development. How does the same genetic information result in different types of cells?.

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developmental biology

Developmental Biology

An Introduction

animal development
Animal Development
  • How has the study of development changed?
animal development3
Animal Development

What kinds of questions are

developmental biologists asking?

animal development4
Animal Development

How does the same genetic information result in different types of cells?

animal development5
Animal Development
  • How is cell division regulated?
animal development6
Animal Development
  • How do cells form ordered structures?
animal development7
Animal Development
  • How are reproductive cells set apart?
animal development8
Animal Development

How do changes in development create new body forms and what changes are possible?

animal development9
Animal Development
  • How do each of these contribute to the study of development?
    • comparative embryology
    • evolutionary embryology
    • teratology
    • mathematical modeling
comparative embryology
Comparative Embryology
  • Epigenesis versus preformation
comparative embryology11
Comparative Embryology
  • How does the concept of germ layers support epigenesis?
  • How does the concept of induction fit in here?
comparative embryology12
Comparative Embryology
  • What principles did

von Baer articulate

with respect to vertebrate

development?

comparative embryology13
Comparative Embryology
  • General features of large group of animals appear earlier than specialized features of smaller group
  • Less general characteristics develop from more general
comparative embryology14
Comparative Embryology
  • A particular type of embryo, instead of passing through adult stages of a lower form, departs more and more from it.
  • Embryo of higher animal is only like early embryo of lower animal.
comparative embryology15
Comparative Embryology
  • How have fate maps contributed to our understanding of development?
evolutionary embryology
Evolutionary Embryology
  • How have observations of embryos contributed to our understanding of evolutionary relationships?
evolutionary embryology17
Evolutionary Embryology
  • Why is the distinction between analogous and

homologous structures important?

teratology
Teratology

How are malformations different from disruptions?

mathematical modeling
Mathematical Modeling
  • What’s the difference between isometric and allometric growth?
slide21

Figure 1.22 Pigment patterns of zebrafish homozygous for the wild-type allele (A) and for three different mutant alleles (B–D) of the leopard gene