Introduction to Genetic Analysis 599

Introduction to Genetic Analysis 599 - 44200_18_p575-610...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
secreted protein that activates engrailed expression in the adjacent cell, inducing more EN protein in that cell. side of the reproductive tract of the nematode C. elegans (Figure 18-28). One type is the ability of one cell to in- duce a developmental commitment in only one neigh- boring cell, and the other is the ability of a cell to inhibit its immediate neighbors from adopting its fate. Vulva development has been studied in detail through the analysis of C. elegans mutants that have ei- ther no vulva or more than one. Within the hypodermis (the body wall of the worm), several cells have the po- tential to build certain parts of the vulva. Initially, all these cells can adopt any of the required roles and so are called an equivalence group —in essence, a developmen- tal field. To make an intact vulva, one of the cells must become the primary vulva cell, and two others must be- come secondary vulva cells; yet others become tertiary cells that contribute to the surrounding hypodermis
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/10/2011 for the course BIOL BIOL taught by Professor Johnson during the Spring '08 term at Aberystwyth University.

Ask a homework question - tutors are online