MCD BIO C141 Lecture Notes - Lecture 3: Asymmetric Cell Division, Umbilical Cord, Auxin
23 Apr 2020
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Describe how a genetic screen is performed in plants. Recognize the strengths and weaknesses of genetic screens. A longitudinal division in the ep along with a transverse division in the s. (4 cell stage) A transverse division in the ep (o" line) along with a single transverse division in the s. (8 cell stage) Zygote goes through asymmetric cell division that becomes an apical cell. The apical cell gives rise to the embryo. Basal portion is like the umbilical cord, helps the pant develop but cut when no longer needed. Middle stage of embryogenesis: the embryo proper begins to fully form a globular embryo which contains the precursors to the shoot and root apices. Hypo physical cell gets pushed up into the embryo to become a globular embryo: at the heart stage, each of the layers that will form the sam are defined as well as the root apical meristem. Initiation of organ formation is about to commence.
