Multiple Choice
In agarose gel electrophoresis, how does DNA move through the gel when an electric field is applied?
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18. Molecular Genetic Tools
Methods for Analyzing DNA
Multiple Choice
In DNA fingerprinting, which sections of DNA are most commonly analyzed to distinguish between individuals?
A
Centromeric DNA that is largely identical across individuals within a species
B
Highly polymorphic short tandem repeats (STRs) in noncoding regions
C
The conserved coding sequence of essential housekeeping genes
D
Mitochondrial rRNA gene sequences from the mitochondrial genome
Verified step by step guidance1
Understand that DNA fingerprinting aims to distinguish individuals based on genetic variation.
Recognize that centromeric DNA is largely identical across individuals within a species, so it is not useful for distinguishing individuals.
Know that conserved coding sequences, such as those in essential housekeeping genes, are highly similar among individuals and thus not ideal for fingerprinting.
Learn that mitochondrial rRNA gene sequences are inherited maternally and show less variation between individuals compared to nuclear DNA markers.
Identify that highly polymorphic short tandem repeats (STRs) in noncoding regions exhibit high variability between individuals, making them the most commonly analyzed sections in DNA fingerprinting.
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