ZOO 3050 Lecture Notes - Lecture 7: Oogenesis, Spermatogenesis, Syncytium
5 Feb 2018
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Important role in oogenesis (supportive, etc. : ootid, haploid egg, 1st and 2nd polar body. Can use antibody stain to see it in organism that are not see-through. B is metaphase structurally components are condensing. Associated with nuclear envelope breakdown (germinal vesicle breakdown). C is anaphase i spindle apparatus and you see a migration of the spindle apparatus. D is metaphase ii 2nd polar body is formed. The first polar body has undergone a division. End up with 3 polar bodies and one egg. 1st polar body that was put to the surface divides again. Meiosis in the sea urchin oocyte: f are the polar bodies, not clear what they are doing here, eventually they are lost. In some groups there are parthinogenic species that use the polar bodies to fertilize the egg (another haploid set) Differences in oogenesis: primarily talking about mammals.
