The engrailed gene is activated in cells that have high levels of the Even-skipped, Fushi tarazu, or Paired & repressed in cells that have high levels of Odd-skipped, Runt, or Sloppy-paired

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#Id: 100

#Unit 5. Developmental Biology

Massive cell rearrangements and migrations precede or accompany conditional specification.

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#Id: 101

#Unit 5. Developmental Biology

Conditional Specified cells

Capacity for "regulative" development

Allows cells to acquire different functions

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#Id: 102

#Unit 5. Developmental Biology

If conditionally specified cells are removed from the embryo, the remaining cells can regulate and compensate for the missing part.

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#Id: 103

#Unit 5. Developmental Biology

Hans Driesch’s pressure-plate experiment implies that cell interaction is critical for normal development.

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#Id: 104

#Unit 5. Developmental Biology

Syncytial specification uses elements of both autonomous and conditional specification.

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#Id: 105

#Unit 5. Developmental Biology

A cytoplasm that contains many nuclei is called a syncytium.