DNA Fingerprinting Lab Questions

Introduction

1. DNA is only the same in the case of identical twins.
2. They are used as evidence in crime investigations.

It Takes A Lickin

1.Somebody ate Jimmy's holographic lollipop.
2. Saliva was extracted from the scene.

Fingerprinting at the Nova Lab

1. Restriction enzymes cut DNA molecules like scissors, hacking at different parts.
2. It is a thick, gel-like substance that acts as a molecular strainer, allowing smaller pieces o flow through more easily.
3. Electrophoresis is the process of moving molecules with an electric current.
4. Easier
5. Placing the membrane over the gel makes it easier to work with.
6. Probes attach themselves to pieces of DNA along the membrane.
7. The probes produce radioactivity.
8. The DNA looks like a bar code. It is a mixture of thick strips and thin ones.
9. Honey licked the lollipop!!!!!

DNA Workshop site.

1.You can synthesize proteins and replicate DNA.

Paragraph on DNA Fingerprinting

A common way forensic investigators solve crimes is by using DNA fingerprinting. In this method, the culprit is identified by sets of numbers representing his/her the genes. It can be utilized in rape and other criminal cases, as well as paternity testing. Despite the 43.2% similarity in all human DNA sequences, separate code samples are still distinguishable. Some repetitive chunks of the genetic code, called variable number tandem repeats, are clearly different in every person. These are noted by investigators and then matched up in a database. The closest match to the dissected sample will be the culprit.