Biology 1002B Lecture Notes - Lecture 16: Zygosity, Multinucleate, Programmed Cell Death
31 May 2016
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Fruit fly nucleus divides but the cell does not. In humans our cells divide too: nuclei migrate to the periphery and become cellularized. Cell membranes capture each of the nuclei. Blastula becomes highly segmented, which are represented in the adult. Important for nuclei to know where they are in embryo (find out why) 2 organisms from one genome: once gastrula develop, they develop into a worm, which just eats, worm then hardens into pupi and transforms into a fly. How could you discover the genes involved in development: knocking out genes and seeing effects on development. Common in head (anterior), not common in tail (posterior: gurken gene. Dorsal and ventral no nanos, no abnomen. Help nuclei figure out where they are in the embryo. Not concentration of these genes, by doing this they can orientate themselves: biocoid mrna and protein gradients. Moms pack eggs with protein, ribosomes, mrna and other stuff. Bicoid mrna is only found in the.
