DNA Evidence Ė History and Status

Written by Nick Smith

When Gregor Mendel published his studies of inherited characteristics of pea plants in 1866, he probably didn't know he was starting a sequence of events that would end inrepparttar 1987 conviction of someone inrepparttar 143107 United States based on DNA evidence. This article discussesrepparttar 143108 history and current status ofrepparttar 143109 use of DNA evidence inrepparttar 143110 United States.

How DNA Evidence is Gathered and Used

DNA (deoxyribonucleic acid) is a nucleic acid consisting of two chains of nucleotides bonded together in a double helix, and is responsible for determiningrepparttar 143111 inherited characteristics of each person. Historically, DNA could only be extracted reliably from clean specimens of blood or other body fluids. Due to recent scientific developments, DNA evidence can be extracted and amplified from a variety of samples, including licked stamps, dental floss, used razors, hair, and even sweaty t-shirts.

The DNA evidence is taken back torepparttar 143112 laboratory whererepparttar 143113 sample is cleaned and prepared. The DNA is cut into small, manageable pieces using enzymes, and then it is categorized by size using a process known as "gel electrophoresis." We all share some 99.9% of our DNA, but there are specific regions in our DNA that differ. In certain areas, given sequences ofrepparttar 143114 bases adenine, thymine, cytosine, and guanine repeat themselves. The sequences, known as variable number tandem repeats, or VNTRs, create a unique personal blueprint that can be used as DNA evidence.

The VNTRs are marked with a radioactive compound that aids in being able to make an x-ray image ofrepparttar 143115 DNA sequence. These images, which arerepparttar 143116 DNA evidence ultimately presented in courts, can then be compared torepparttar 143117 DNA sample collected from a suspect.

The DNA sample fromrepparttar 143118 crime scene andrepparttar 143119 suspect are compared at a number

Rosen Divorce Hosts Free Fatherís Day Technology Forum

Written by Alison Kramer


Rosen Divorce Hosts Free Fatherís Day Technology Forum

Helping Fatherís maintain closerís ties with their children through technology

WHAT: In recognition of Fatherís Day, Rosen Divorce will host a free 60-minute on-line interactive web and audio forum. The forum will present and discuss different ways for fathers to maintain closer ties with their children through on-line services and games.

WHERE: This is a live interactive web and audio meeting. To participate follow these simple steps:

1. Go to www.readycast.com 2. Click on Attend a Meeting 3. Click on Unlisted Meeting 4. Enter meeting number: 748362188 *Upon login torepparttar interactive web you will be presented with a dial-up and participant number to addrepparttar 143106 audio component

WHEN: June 16, 7pm-8pm

GENERAL INFORMATION: With offices in Raleigh and Charlotte, Rosen Divorce isrepparttar 143107 largest divorce firm in North

Cont'd on page 2 ==>
ImproveHomeLife.com © 2005
Terms of Use