EVERYDAY SCIENCE

Detailed explanation-1: -A one-cell embryo (zygote) is “totipotent” in both senses; yet, some authors characterize tumors [1, 2] and stem cells [3, 4] as “totipotent, ” based only on the second definition (ie, the ability of these cells to produce a wide range of cell types).

Detailed explanation-2: -The cell that is capable of developing into any cell type. In a developing embryo, totipotent stem cells are able to produce every cell type in an embryo, including the extraembryonic tissue. Compare: unipotent cell, multipotent cell, pluripotent cell.

Detailed explanation-3: -Totipotent cells formed during sexual and asexual reproduction include spores and zygotes. In some organisms, cells can dedifferentiate and regain totipotency. For example, a plant cutting or callus can be used to grow an entire plant.

Detailed explanation-4: -Totipotency: The ability of a living cell to divide and produce all the differentiated cells in an organism is called totipotency. A single cell divides and forms a whole new organism. Plant cells have the ability to divide and form a new organism.