Nov 05, 2020
Let's have more background information about how animal embryos begin cell differentiation in spatially patterned ways. This 24-minute talk introduces the tricks in a phylogenetic context - I show you how animal phyla appear to be related to each other, and broadly discuss how different kinds of animal eggs turn themselves into different kinds of animals.
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Embryonic cells make choices that guide the differentiation of their clonal descendants. Such decisions establish the outline of a snail's whole body in a spatially patterned array of just twelve diverse, unambiguously identified single cells which are differentially exposed to a signal briefly emanating from a point source. We want to know if (and how) a change in this pattern causes the neck-founder cells to inappropriately form trunk structures, and if lack of a neck makes the head pop off.
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