DnaA has a weak intrinsic activity that converts the ATP to ADP, this is enhanced by a factor termed Hda.

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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.

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#Id: 106

#Unit 5. Developmental Biology

Syncytial specification occurs when cell fates are determined in a syncytium of nuclei, as in the

Drosophila blastoderm

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#Id: 107

#Unit 5. Developmental Biology

A cell is determined to a given fate if it maintains its developmental maturation toward this cell type even when placed in a new environment (commitment is irreversible).