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In humans, identical twins are possible because A. extraembryonic cells interact with the zygote nucleus. B. convergent extension occurs. C. early blastomeres can form a complete embryo if isolated. D. the gray crescent divides the dorsal-ventral axis into new cells.

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In humans, identical twins are possible because C. early blastomeres can form a complete embryo if isolated.

Identical twins are formed when an egg after fertilization by a sperm gets divided into two.

The early blastomeres are totipotent cells which means that they have the capability to form all the cells of the body further. Hence, if an egg after fertilization splits into two, it has the potential to form a complete embryo which forms an individual.

However, as the splitting process has occurred after fertilization, hence the two individuals formed will be identical twins. The genome for the identical embryos will be identical.

Identical twins are also referred to as monozygotic twins as they arise from a single egg or zygote.

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