Biology, 21.04.2020 04:24, tlturner03

In humans, identical twins are possible because:
a. convergent extension occurs.
b. early blastomeres can form a complete embryo if isolated.
c. cytoplasmic determinants are distributed unevenly in unfertilized eggs.
d. extraembryonic cells interact with the zygote nucleus.
e. the gray crescent divides the dorsal-ventral axis into new cells.

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In humans, identical twins are possible because:
a. convergent extension occurs.
b. ea...