DNA fingerprinting relies on identifying variations in specific DNA sequences known as:
Variable Number of Tandem Repeats (VNTRs)
Exons
Introns
DNA probes
Related Questions
By whom satellite DNA used as probe and developed ___ technique
Alec Jefreys – DNA finger printing
Sanger – HGP
Gaspard – Gustave Coriolis – centrifugal force
Arne Tiselius – Electrophoresis
DNA fingerprinting is based on the principle of variations in:
Number of short tandem repeats (STRs) in DNA
Number of genes in DNA
Sequence of the entire genome
Number of chromosomes
A forensic scientist is comparing DNA samples from a crime scene. The analysis focuses on specific repetitive sequences that vary greatly between individuals. These sequences are known as:
VNTRs
SNPs
Restriction sites
Coding sequences
Why is maintaining a high temperature in the initial step of PCR crucial for the subsequent annealing of primers?
It activates the DNA polymerase enzyme.
It prevents the degradation of primers.
It ensures the availability of single-stranded DNA for primer binding.
It promotes the incorporation of dNTPs.
Palaeontologists unearthed a human skull during excavation. A small fragment of the scalp tissue was still attached to it. Only little DNA could be extracted from it. If the genes of the ancient man need to be analysed, the best way of getting sufficient amount of DNA from this extract is
By hybridizing the DNA with a DNA probe
By subjecting the DNA to polymerase chain reaction
By subjecting the DNA to gel electrophoresis
By treating the DNA with restriction endonucleases
DNA polymorphism forms the basis of:
Genetic engineering
DNA fingerprinting
Recombinant DNA technology
Gene therapy
Palaeontologists unearthed a human skull during excavation. A small fragment of the scalp tissue was still attached to it. Only little DNA could be extracted from it. If the genes of the ancient man need to be analysed, the best way of getting sufficient amount of DNA from this extract is
By hybridizing the DNA with a DNA probe
By subjecting the DNA to polymerase chain reaction
By subjecting the DNA to gel electrophoresis
By treating the DNA with restriction endonucleases
Satellite DNA is significant primarily because it:
Forms a distinct band in density gradient centrifugation
Codes for essential proteins
Regulates gene expression
Plays a key role in DNA repair
Alec Jeffreys developed the DNA fingerprinting technique. The probe he used was
Ribozyme
Sex chromosomes
SNP
VNTR
After performing gel electrophoresis to separate DNA fragments, a researcher uses a UV transilluminator. What is the MOST likely reason for this step?
To visualize the DNA fragments stained with a fluorescent dye
To fix the DNA fragments in the gel
To further separate the DNA fragments
To purify the DNA fragments
