12
QuizMultiple Choice

Genetics and Heredity — Test

Question 12 • Biology

Which DNA fingerprinting technique examines the length variation of DNA repeat sequences in human DNA?

Answer
A
polymerase chain reaction analysis
B
Y chromosome analysis
C
mitochondrial DNA analysis
D
variable tandem repeats analysis

Explanation

Variable tandem repeats (VNTRs) are short DNA sequences repeated one after another, and the number of repeats can differ among people. VNTR analysis compares the resulting length differences in these DNA regions, so the correct choice is variable tandem repeats analysis. PCR can amplify DNA, but it is not itself the name of this repeat-length technique.

AI-written and checked against the verified answer.

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