In humans, identical twins are possible because ______. A. cytoplasmic determinants are distributed unevenly in unfertilized eggs B. extraembryonic cells interact with the zygote nucleus 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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23-08-2022
Biology

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In humans, identical twins are possible because ______. A. cytoplasmic determinants are distributed unevenly in unfertilized eggs B. extraembryonic cells interact with the zygote nucleus 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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SidHussain SidHussain · Answer 1 · 2022-08-26T05:43:36+02:00

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

Blastomere is the mass of cells that forms after the process of fertilization has occurred. These blastomeres can form all the cell types of the body which means that they are totipotent. A blastomere has the capability to form a complete embryo.

Identical twins are formed when a fertilized egg gets split. As the genome in the two blastomeres will be the same after fertilization, hence the twins formed will be identical.

We also refer to identical twins as monozygotic twins because they form from the same zygote.

All the other options mentioned are not correct as they are not the reasons for the formation of identical twins.

To learn more about identical twins, click here:

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