DNA Think About NOW When you hear the term DNA, what comes to mind? What do you think DNA looks like (under the microscope of course)? What happens when something goes wrong with DNA?

Your body's unique fingerprint!!! DNA: THE ALAPHABET OF LIFE Your body's unique fingerprint!!!

DNA

Where is DNA found in the Cell?? Answer: The Nucleus

DNA DEOXYRIBONUCLEIC ACID Stores and passes on genetic information from one generation to another .

Fun DNA Facts! DNA is too small to see, but under a microscope it looks like a twisted up ladder! DNA stands for: D: Deoxyribo N: Nucleic A: Acid Every living thing has DNA. That means that you have something in common with a zebra, a tree, a mushroom and a beetle!!!!

DNA Who Done It? James Watson, Francis Crick and Rosalind Franklin are credited with discovering the double helix structure of DNA. Watson and Crick used Franklin’s x-ray data to write “The Double Helix”

DNA Dorks Watson Crick Franklin

X-Ray picture of DNA X-ray crystallography is a method of determining the arrangement of atoms within a crystal, in which a beam of X-rays strikes a crystal and diffracts into many specific directions.

DNA STRUCTURE The DNA structure is shaped liked a spiral staircase, or twisted ladder.

DNA STRUCTURE The outer parts of the ladder are made of sugars (deoxyribose) bonded to each other by phosphates.

DNA STRUCTURE The steps of the ladder are made of pairs of nitrogen bases.

DNA is made up of steps and rails of a ladder. C G This is a rail A T G C C G This is a step A T C G Green can only go with Red G C A T A T G C Purple can only go with Yellow Nitrogen Bases (Steps) G C

DNA STRUCTURE ADENINE = A GUANINE = G CYTOSINE = C THYMINE = T THE NITROGEN BASES ARE REPRESENTED BY THEIR CAPITAL LETTER.

DNA STRUCTURE There is only one way the nitrogen bases can form Adenine pairs with Thymine Guanine pairs with Cytosine

DNA STRUCTURE QUESTION ? Can C join with A? And G join with T?

DNA STRUCTURE ACTCATGGTCATG TGAGTACCAGTAC This is an example of a genetic code that may be found in your body.

DNA STRUCTURE The combinations of the nitrogen bases is the code that produces the genes for a particular trait.

DNA STRUCTURE Because there can be so many different combinations of the bases the code can be limitless

DNA REPLICATION Replication: is the process where DNA molecules form exact duplicates.

****DNA replication needs to happen before a cell divides. DNA REPLICATION STEPS The ladder splits 2. Free floating nitrogen bases begin to pair with each strand 3. Two new DNA chains are formed ****DNA replication needs to happen before a cell divides.

DNA Replication Video