DNA fingerprinting is different from DNA sequencing because it_____?
Sunday, September 27th, 2009 at
5:41 pm
a. involves inserting normal genes into cells with a genetic disorder
b. involves a vector, and DNA sequences does not
c. compares DNA fragments rather than the nucleotide order of DNA
d. makes millions of copies of DNA pieces
Please choose for th best answer and explain it..
tnx!
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Tagged with: cells • dna fragments • dna pieces • dna sequences • genes • genetic disorder • nucleotide • vector
Filed under: DNA Fingerprinting
C.compares DNA fragments rather than nucleotide order.
The chemical structure of everyone’s DNA is the same. The only difference between people is the order of the base pairs. There are so many millions of base pairs in each person’s DNA that every person has a different sequence.
Using these sequences, every person could be identified solely by the sequence of their base pairs. However, because there are so many millions of base pairs, the task would be very time-consuming. Instead, scientists are able to use a shorter method, because of repeating patterns in DNA.
These patterns do not, however, give an individual "fingerprint," but they are able to determine whether two DNA samples are from the same person, related people, or non-related people. Would you believe that only 0.1% of your DNA sequence is different from mine..? Scientists use that small number of sequences of DNA that are known to vary among individuals a great deal, and analyze those to get a certain probability of a match. So, a DNA fingerprint tells us whether two DNA samples are related by comparing a few regions of DNA, which are bound to differ between individuals. This comparison can be done without sequencing, by the use of probes. Whereas, DNA sequencing tells us the order of each and every base pair in a sequence.
d. Makes millions of copies of DNA pieces.
Which means you can make clones.
This looks like a test question. While it may be an old test there is no guarantee that somehow you are not trying to shortcut the assessment of knowledge function by displaying an ability to rapidly gather information.
You could be cheating on a test.
D !
you can make clones.
C.
DNA fingerprinting is comparing certain fragments or sequences of DNA to someone else. Now everyone has DNA but everyone’s DNA is different (except identical twins) so when you analyze someones DNA you can create a "fingerprint" but in DNA format and compare it to someone elses.
DNA sequencing is basically determining the order of the nitrogenous base pairs: adenine, thymine, cytosine and guanine in someone’s DNA to someone elses.
Did that help you understand?