Which of the following is an illustration of permissive interaction? -When implanted in the newt embryo, the frog oral ectoderm can only differentiate into frog derivatives and will not differentiate into newt derivatives. -Contact with the appropriate extracellular matrix is sufficient for cells to express differentiation-specific genes. -An inducing signal from the optic vesicle is necessary for new gene expression in the lens ectoderm.
Which of the following is an illustration of permissive interaction?
-When implanted in the newt embryo, the frog oral ectoderm can only differentiate into frog derivatives and will not differentiate into newt derivatives.
-Contact with the appropriate extracellular matrix is sufficient for cells to express differentiation-specific genes.
-An inducing signal from the optic vesicle is necessary for new gene expression in the lens ectoderm.
The epidermis signals the underlying dermis to create condensations and the dermal condensations then signal the epidermis to form specific cutaneous structures.
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Wing epidermal epithelium produces wing feather when exposed to wing dermal mesenchyme, but will produce scales and claw when exposed to foot dermal mesenchyme.
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