In humans, identical twins are possible because
Question and options
In humans, identical twins are possible because
- cytoplasmic determinants are distributed unevenly in unfertilized eggs
- extraembryonic cells interact with the zygote nucleus
- convergent extension occurs
- early blastomeres form a complete embryo if isolated
Answer and explanation
Correct answer: D - early blastomeres form a complete embryo if isolated
Early human blastomeres are totipotent (regulative development): if separated, each can form a complete embryo, giving identical twins.
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