DNA Evidence
Matt HoagChris HilcheyChris Cirullo
What is the second step?
• The second step is to crunch the numbers by applying the principles of population genetics to prove a match mathematically.
• This is important because there are only about 3 million base pairs that are different (around .1%), from person to person.
What is non-coding DNA?
• Non-Coding DNA Consists of 95% of the genetic makeup.
• It use to be called “Junk DNA”, because it does not code for protein.
• Now it is found that it has important functions as:
• Regulating gene expression during development• Aiding or Impeding cellular machinery from reading
nearby genes and making protein
Why are VNTR DNA profiles from both parents important?
• Because you inherit two different number of repeats in each VNTR region (one from your mom the other from your dad).
Why do DNA profiles create discrete bands?
• DNA profiles create discrete bands because the larger the fragments of DNA move faster than the smaller fragments do, leaving spaces in between the two.
What are DNA ladders?
• DNA Ladders are solutions of DNA molecules that formed during electrophoresis.
• Ladders are there to positively match a sample to a suspects DNA
What can DNA profiles be used for?
• DNA profiles can be used to free people from prison you have been wrongfully jailed.
• They can be used in Paternity test to see who a babies father is.
• They can ID an unknown person.• They can also be used to study inherited
diseases
THE END