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Biol Bull 63: 381-386. (December 1932)
© 1932 Marine Biological Laboratory
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THE MOSAIC DEVELOPMENT OF THE ASCIDIAN EGG

N. J. BERRILL 1

1 DEPARTMENT OF ZOÖLOGY, McGILL UNIVERSITY, MONTREAL

A new method of removing the membranes from ascidian eggs in the mass is described. Essentially the method is the use of proteolytic enzymes.

The development of isolated blastomeres is described, confirming Conklin's results that the development of each is strictly partial and that the whole development is a mosaic. It is also shown that the presence of the egg membrane and of injured or dead blastomeres in his experiments in no way invalidated those results.




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T. Meedel, S. Farmer, and J. Lee
The single MyoD family gene of Ciona intestinalis encodes two differentially expressed proteins: implications for the evolution of chordate muscle gene regulation
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[Abstract] [PDF]


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