Cellular totipotency questions 40, Cellular totipotency problems

That's a good question.

I don't understand either.

It is only known that highly differentiated cells do not appear to be totipotent.

Totipotency is unlimited, specifically all cells have totipotency. The reason why it is not reflected is only because of the current level of science and technology of human beings, which can only expand some cells at present.

Of course, a cell without a nucleus is not totipotent.

All I know is that differentiated cells are not all totipotent, and plants are different...As for why....

Gene expression is restricted after differentiation.

Its nucleus is still totipotent.

No, totipotency is that only one cell has a whole set of genetic information and has the potential ability to develop into a whole individual, in fact, as long as a cell has a whole set of genomes, it can be said that he has totipotency.

The zygote has the greatest totipotency, note that it is the "largest", and compared to other cells, the zygote certainly has the greatest totipotency. "Only differentiated cells can embody totipotency", this sentence is also true, how to show that it has totipotency without differentiation, like a cell, to prove that it has totipotency, then it depends on whether it can differentiate, and it can be differentiated to show that it has totipotency, so "differentiated cells embody totipotency", pay attention to "embodiment".

And the teacher said that those hematopoietic stem cells are totipotent, and yes, if it is allowed, then it can also develop into a whole individual.

Cellular totipotency refers to cells that have differentiated and still have the potential to develop into a complete organism. In multicellular organisms, the nucleus of each somatic cell contains all the genes of ontogeny, and can develop into a complete individual as long as conditions permit.

A large number of scientific experiments have proved that highly differentiated plant cells still have the ability to develop into a complete plant body, that is, maintain the totipotency of the cell. In animals, with the increase of the degree of cell differentiation, the differentiation potential of cells is getting narrower and narrower, but their nuclei still retain all the original genetic material and have totipotency.

The successful cloning of Dolly's sheep proves the totipotency of animal nuclei. The totipotency of the nucleus is the basis of the cell totipotency, and the cell totipotency can only be manifested when the conditions inside and outside the cell allow the totipotency of the nucleus to be expressed.

Somatic cells have the potential to develop into complete individuals because they have the full set of genetic material of the species, which is totipotent. The ontogeny process of plants is relatively simple, so cells are totipotent. The ontogeny process of animals is quite complex, and the nucleus is totipotent.

Totipotency depends on whether the cell has developed into a complete individual, and if it differentiates into tissues or organs, it does not exhibit totipotency.

The concept and causes of cellular totipotency.