BIO230H1 Lecture Notes - Lecture 9: Hematopoietic Stem Cell Transplantation, Stem Cell Factor, Scaffold Protein
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BIO230H1 Full Course Notes
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3 is very similar to 2, but it happens again and gain. B cells secrete morphogens that act on a cells, and a cells redpond to the morphogen and become c cells. The a cells then change to d cells and th b cells become e cells and this keeps on happening. There is a stripped pattern in the results, just like in the 2nd path(cid:449)a(cid:455). These (cid:272)ells a(cid:396)e(cid:374)"t diffe(cid:396)e(cid:374)t i their dna, what comes out of their dna is different, their gene expression is different. The morphogen might not directly affect gene transcription, but eventually it will. Segmental patterns are segments of the body or developing embryos that repeat in a pattern. If (cid:449)e delete the k(cid:396)upple ge(cid:374)e, the la(cid:396)(cid:448)a does(cid:374)"t fo(cid:396)(cid:373) p(cid:396)ope(cid:396)l(cid:455). If (cid:449)e delete goose(cid:271)e(cid:396)(cid:396)(cid:455), the la(cid:396)(cid:448)a foes(cid:374)t form properly. The grey parts get tucked inside and they become the internal organs.
