A researcher has compared the DNA sequences of a “parent’” cell and the daughter
ID: 186938 • Letter: A
Question
A researcher has compared the DNA sequences of a “parent’” cell and the daughter cells it produced. What do you suspect she found?
The DNA sequences of the parent and daughter cells must have been completely identical.
The DNA sequences of the parent and daughter cells were largely similar, with the exception of any de novo mutations.
No similarities existed between the DNA sequences of the parent and daughter cells.
Only the parent cell contained DNA; the daughter cells did not demonstrate any DNA.
Any of the above answer options are possible.
The DNA sequences of the parent and daughter cells must have been completely identical.
The DNA sequences of the parent and daughter cells were largely similar, with the exception of any de novo mutations.
No similarities existed between the DNA sequences of the parent and daughter cells.
Only the parent cell contained DNA; the daughter cells did not demonstrate any DNA.
Any of the above answer options are possible.
Explanation / Answer
Second option is the correct answer. The DNA sequence of parent and daughter cells were largly similar because each strand of the DNA of parent cells act as template for synthesis of daughter DNA during replication and newly synthesized daughter DNA are complimentary to this tempelate. Thus, parent and daughter DNA are largly similar but if any mutation occurs during replication (de novo mutation), than that mutaion will be present within daughter DNA.
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