1. Chapter 6: Genes and DNA
Standard S7L3: Recognize how biological traits are passed on to successive generations

2. EQ: What is the basic structure of DNA?
Deoxyribonucleic acid, genetic material
Chromosomes are made of protein and DNA
Gives instructions fro building and maintaining cells
Copied each time a cell divides to make identical genes

3. Subunits of DNA Nucleotide 4 Bases of Nucleotide
Made of a sugar, a phosphate and a base
Are identical except for the base
Adenine (A)
Thymine (T)
Guanine (G)
Cystosine (C)

4. Charguff’s Rules about DNA’s Bases
Shape of DNA
The amount of adenine equals thymine
The amount of guanine equals cytosine
Twisted ladder
Rungs of the ladder are made of pairs of bases
Adenine with thymine
Guanine with cytosine

5. EQ: How are copies of DNA made?
Replication
Makes copies
The pairing of bases allows for replication of DNA.
Pairs of bases are complimentary to each other.
So both sides of the ladder are complimentary.

6. During replication
DNA molecule splits down the middle.
The bases on each side of the molecule are used as a pattern for a new strand.
Complimentary nucleotides are added to the original sides of DNA ladder.
Two DNA molecules form.
Half is new DNA, half is old