In humans, identical twins are possible because
A)of the heterogeneous distribution of cytoplasmic determinants in unfertilized eggs.
B)of interactions between extraembryonic cells and the zygote nucleus.
C)of convergent extension.
D)early blastomeres can form a complete embryo if isolated.
E)the grey crescent divides the dorsal-ventral axis into new cells.

Question

Quizplus · Accepted Answer

Identical twins are formed when a single fertilized embryo splits into two, resulting in two genetically identical embryos. This can happen if early blastomeres (cells formed by mitosis after fertilization) are isolated and form complete embryos, which can then develop into identical twins.

In Humans, Identical Twins Are Possible Because