1. 7th Grade Science Biology (DNA) Clinton County Middle School
Genetics
7th Grade Science
Biology (DNA)
Clinton County Middle School

2. Objectives Describe the combination of traits in organisms
Identify where hereditary information is contained
Identify parts of DNA molecule and its structure
Explain how DNA copies itself
Describe structure and function of each kind of RNA

3. Bell Ringer Pass out Ecology Test Go over answers to test
Take 2 minutes to look over test
Go over answers to test
Check for miscalculations
Discuss Class average
Did you or did you not meet goal?
What can we do better?

4. Key Vocabulary Chromosome Eukaryote Prokaryote Gene Trait
Tight coils of DNA
Eukaryote
A cell that has a membrane-bound nucleus
Prokaryote
A cell whose nucleus is not bound by a membrane
Gene
a specific sequence of DNA nucleotides that carry hereditary traits
Trait
Genetic characteristics of an individual

5. DNA Aka-Deoxyribonucleic Acid (DNA)
99.9% of DNA is the same in all humans
Only 0.1% of your DNA is unique to you!
Scientist knew about DNA since mid-1800’s
In 1952, scientist Rosalind Franklin discovered DNA’s 2 chains
In1953, using work of Franklins, James Watson and Francis Crick made a model of a DNA molecule

6. Nitrogenous Base Pairs
Adenine (A)
Thymine (T)
Cytosine (C)
Guanine (G)
Adenine---Thymine
Cytosine--Guanine

7. Quiz Time Which Nitrogenous pairs, pair up in a double helix of DNA?
In 1952, who was the scientist that discovered that DNA had 2 chains?
Watson and Crick created a model of what?