Aculture of human tissue is being grown in a lab to study mitosis. a solution containing radioactively labelled cytosines was added to the culture in the middle of prophase, and then growth was halted at the end of telophase.

where would the scientists see radioactively labelled dna?

a. in the mother cells only-not in the cells produced at the end of telophase
b. only in the nuclei of half the cells
c. in the cells produced at the end of telophase-only in the daughter cells
d. in the nuclei of every cell
e. nowhere in the cells

E. Nowhere in the cells

Explanation:

The cell cycle is an ordered set of events leading to cell growth and division into two daughter cells. The stages are G1-S-G2 (which comprise the interface of the cycle) and M. During the interface, the cell grows and synthesizes components necessary for survival (during G1 and G2), and duplicates its DNA (during S). And during M (Mitosis), the division of the nucleus into two daughter nuclei, and division of the cytoplasm occurs (the latter in a process called cytokinesis).

So, mitosis is the actual cell division, producing two genetically identical daughter cells.  Each cell is diploid and contains the same number of chromosomes, because the genetic material was previously duplicated during S stage in interphase.

The stages of mitosis consist of :

Cytosine is one of the five nitrogenous bases that make up the nucleic acids (DNA and RNA) and is represented in the genetic code by the letter C. The other four bases are adenine, guanine, thymine and uracil.

If the labeled cytosine is added during the prophase of mitosis, the DNA has already been duplicated during the S-stage and will no longer incorporate this labeled base into the molecule.  So is not going to be found in either the mother cell or the daughter cells.

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guys i’m confused.

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answer: b rock