1 / 4

DNA and Forensics

DNA and Forensics. Still needs work. DNA. · A DNA molecule is composed of two DNA strands twisted into a double helix, resembling two wires twisted around one another. · Each unit of DNA consists of one of four bases-adenine, guanine, cytosine, thymine.

lotta
Download Presentation

DNA and Forensics

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. DNA and Forensics Still needs work

  2. DNA · A DNA molecule is composed of two DNA strands twisted into a double helix, resembling two wires twisted around one another. · Each unit of DNA consists of one of four bases-adenine, guanine, cytosine, thymine. · DNA is individual to all people except identical twins. · Nuclear DNA is inherited from both the mother and the father. · Mitochondrial DNA (maternal DNA) is inherited solely from the mother. · All members of a family who are maternally related have the same mitochondrial DNA. Picture: www.columbia.edu/cu/opg/info/info.html Picture: www.nurseweb.ucsf.edu/www/cardio.htm

  3. Mitochondrial DNA · Mitochondria are cell structures found in all human cells. · They provide 90% of the energy that our body needs to function. · A single mitochondrion contains several loops of DNA. · Each cell in our bodies contain hundreds and thousands of mitochondria. · Forensic scientists use mitochondrial DNA in situations where: - Nuclear DNA is significantly degraded. - Nuclear DNA is present in small quantities. - Authorities cannot obtain a reference sample from an individual who is long deceased or missing. Picture: http://festival01.nih.gov/seclev/image.jpg Picture: http://www.uta.fi/imt/gifs/1b.jpg

  4. Mitochondrial DNA Fingerprints · In situations where authorities cannot obtain a reference sample from a missing child, a mitochondrial DNA reference sample is obtained from maternally related relatives. Picture: www.nobel.se/chemistry/educational/ poster/1993/pcr.html · Mitochondrial DNA can be amplified by using polymerase chain reaction. Picture: www.bris.ac.uk/.../research/ usowicz/mmufacil.htm Picture: www.diabetes.com.au/research/ labmethods.htm

More Related