reliable prediction of the events that will transpire during development—it never tells us thecommitment of a cell at any particular stage. Commitment is only ascertained by discreteexperimental tests. To test specification, the eye progenitor would need to be isolated andallowed to develop in a neutral environment; to test determination, the eye progenitor wouldneed to be isolated and placed into another distinct environment in the embryo and tested forwhether or not it still formed an eye.5.What does this experiment suggest about the mechanism of development that is operativewith regard to the eye? In your answer, clearly define the difference between mosaic andregulative mechanisms of development.In this experiment, you removed the eye progenitor and yet an eye developed later on inembryogenesis. This finding tells you that other embryo cells are competent to become an eye inthe absence of the eye progenitor, thus a regulative mechanismof development is suggested. In
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