Gastrulation

... not instantaneously abort. In sea urchin, polyspermy does not result in "instantaneous abortion" and development can continue through gastrulation (cf. Boveri). This development occurs even though 2(+) asters are introduced into the egg, which royally f***s up the partitioning of chromosomes ...

See entire post

Can anyone please help me out..I just cant understand this gastrulation stage ...my book's too confusing..can't understand how the hypoblast forms the yolk sack? and what exactly are area pelucidia and area opaca? cant understand primitive streak as well ...

See entire post

zygote, blastula, morula, gastrula, embryo gametogenesis fertilization blastulation gastrulation neurulation= only in Chordates organogenesis Hope this helps.

See entire post

... between 13 and 16 pmol O2 hour21 per individual to day 47 (the time period studied). Protein synthesis rates were about 5 ng hour21 except during gastrulation (day 12), when a rapid increase in protein synthesis was evident (15 to 25 ng hour21; Fig. 1A) (9). Once the pluteus larval stage was reached ...

See entire post

... 32.2 represents an early embryonic development in animals zygote->mitotic divisions->blastula(form like hollow ball)->gastrula(result of gastrulation-inward folding) figure 32.4 represents hypothesis for the origin of animals from a flagellated protist colonial protist->hollow sphere ...

See entire post