DNA fingerprints: banding on DNA autoradiograms
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DNA fingerprints: banding on DNA autoradiograms
DNA fingerprints. Banding patterns on DNA sequenc- ing autoradiograms forming " genetic fingerprints" which enables genes to be mapped. The pattern of black bands gives the sequence of base pairs that form the genetic code for a section of DNA. A sample of DNA has been cut into fragments by an enzyme and marked with a radioactive tag for sequencing. The DNA fragments are then separated by electrophoresis in an agarose gel, moving different distances along the gel according to their size. The result is this banding pattern which is unique to each person. DNA fingerprints can be used to prove whether people are related, and can help to identify and convict criminals
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6389487
© TEK IMAGE/SCIENCE PHOTO LIBRARY
Analysis Autoradiogram Autoradiograph Bio Technology Dna Fingerprinting Dna Lab Dna Research Dna Sequencing Dna Sequencing Autoradiogram Double Helix Electrophoresis Gel Gene Genetic Genetic Fingerprint Bio Chemistry Deoxyribonucleic Acid Genetics Laboratory
EDITORS COMMENTS
This print showcases the intricate banding patterns on DNA autoradiograms, commonly known as DNA fingerprints. These unique patterns are formed by the sequence of base pairs that make up the genetic code for a specific section of DNA. In this image, we witness a sample of DNA being cut into fragments by an enzyme and labeled with a radioactive tag for sequencing. To analyze these fragments further, electrophoresis is employed in an agarose gel. The different sizes of the DNA fragments cause them to move varying distances along the gel during this process. As a result, we observe this mesmerizing banding pattern which is distinct and exclusive to each individual. DNA fingerprints serve crucial purposes beyond their aesthetic appeal. They play a vital role in establishing relationships between individuals and can be instrumental in identifying and convicting criminals. By comparing these genetic fingerprints, scientists can determine whether people are related or not. This photograph offers us a glimpse into the fascinating world of genetics research and highlights how advancements in biochemistry and biotechnology have revolutionized our understanding of deoxyribonucleic acid (DNA). It serves as a reminder that every person's genetic makeup is truly unique, making each one of us extraordinary in our own way.
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