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