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Differentiation goes after determination when the cell chooses one way of specializing by showing more and more characteristics associated with a particular cell type.
Determination occurs before differentiation, determination gives an operational definition, commits cell to a subset of cell types at this stage.
Determination occurs when the fate of a cell is already fixed, differentiation is when the cell actually becomes the cell it is meant to be.
Each Cell has the same DNA
The correct answer is option C.
In a multi-cellular organism, all cells contain same DNA content. However, not all genes (protein coding sequence of the DNA) are expressed in all the cells.
During development or growth or repair different cells express different sets of genes at a time and repress other genes.
The same is explained in the option C.
Cells do not use the same sections of DNA, that is, genes in the same proportions, that is, expressiveness at the same time in development, which leads to differentiation.
For example, different blood cells are formed or differentiated from the same stem cells. It is because different cells express different genes during the development. consequently, different proteins or traits are developed in different cells which ultimately leads to the production of differentiated cells.
B) Each cell has the same DNA, so DNA does not play a role in differentiation.
Although the cells within an organism contain the same DNA, cellular RNA has a more important role than DNA in cell differentiation.
DNA stores hereditary information for a very long period and provides the blueprint for making a specialized cell. Whereas the RNA uses that information given by the DNA and involves itself in production of that specialized type of cell in the process of cell differentiation.
The process of gene expression is vital process where the information to make a special type of cell is used to produce the cell. There is influence of environmental factors also, but it is not the primary cause of cell differentiation.
All the cells in a person's body have the same DNA and the same genes. However, the difference between cells in different tissues and organs is that the "expression" of the genes differs between cells. For example, liver cells have different proteins than skin cells, even though their DNA is the same.
So your answer is B
c.Differentiation is not necessarily unequal, but stratification is.
Differentiation implies organising , for example, social groups horizontally. This means that the groups may be at the same satus level and this organization is used to see what is common is all of them and what is different among them. Unlikely, stratification is an organization of social groups which is vertically ordered. This means that the most powerful or the group which has the highest social status is placed above from the ones whose social status is lower.
the answer is b.The model should show the original stem cell dividing to become a differentiated cell and another stem cell.
The correct answer is (B)
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