Question

gastrulation in frog .​

Answer 1

Upon fertilization of an egg cell by a sperm cell in a frog, a zygote is formed. ... The cells that cover the outside of the blastula end up becoming the ectoderm. By the end ofgastrulation in frogs, we've got thegastrula, or three-layered embryo made up of the endoderm, mesoderm, and ectoderm.

Answer 2

Gastrulation in the frog is similar to the sea urchin, but it’s more complicated. One of the main differences is that the blastula is not hollow but is filled with yolk cells. Also different, is that the cells of the blastula in the frog form the ectoderm or endoderm while the mesoderm is made from the yolk cells inside. Another interesting aspect of frog gastrulation is that the blastopore forms a “lip” exactly 180 degrees opposite from where the sperm entered the egg. The lip is the point where the cells begin to turn and migrate inward, forming the blastopore.