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Paper Topic:


DNA Analysis and CODIS 1


DNA Analysis and CODIS

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DNA Analysis and CODIS 2


This essay is over the use of DNA , CODIS , and Short Tandem Repeats . I will discuss the importance of all aspects of DNA particularly how it is beneficial in court and criminal affairs . It relies on 3 sources

DNA Analysis And CODIS

Most people have heard of DNA . If not on the current , popular television shows

like CSI , then most likely on the plethora

of shows that display crime cases that are real

Nowadays , DNA analysis is considered the paramount method in determining biological

relationship as well as a key component in solving crimes . Because everyone 's DNA is

unique , it is the most effective way guarantee authenticity when one has been accused of

a crime . In to obtain info , detectives must use a data bank to retrieve necessary


To understand why a DNA data bank is necessary it is important to know exactly

what DNA is . Firstly , there are cells which makes up all organisms and inside these cells

are chromosomes . Chromosomes , which are made up of DNA , contain all the hereditary

information that an individual has . Now this DNA (Deoxyribonucleic acid ) which makes

up these chromosomes simply contains the blueprints of the organism . It is DNA which

determines what , where , and when to make a certain protein , and it basically is the

storage center for information in almost all creatures . This knowledge of DNA is

important because now it is possible to show the correlation between DNA and forensic

technology . Over 30 thirty states have their own DNA databases and the FBI has a

national database named Combined DNA Index System (CODIS , and it includes the

DNA databases of all states that currently have one

Most of our DNA is identical to DNA of others . However , there are inherited

regions of our DNA that can vary from person to person . Variations in DNA sequence

between individuals are termed polymorphisms . Sequences with the highest degree of

polymorphism are very useful for DNA analysis in forensics cases and paternity testing

This activity is based on analyzing the inheritance of a class of DNA polymorphisms

known as "Short Tandem Repeats , or simply STRs . Short tandem repeat (STR ) in DNA

is a group of polymorphisms that occur when two or more nucleotides are repeated as

well as those repeated sequences are directly adjacent to one another This pattern can

range anywhere from two to ten base pairs . By examining enough STR loci and counting

how many repeats of a specific STR sequence there are at a given locus it is possible to

create a unique genetic pro of an individual . There are currently over 10 ,000

published STR sequences in the human genome . STR analysis has become the prevalent

analysis method for determining genetic pros in forensic cases . STR analysis has only

been around for approximately ten years in the field of forensics . It is used for...

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