lo: swbat understand how dna stores genetic material dn: what is dna? what is the function of dna?...

LO: SWBAT understand how DNA stores genetic material

DN: What is DNA? What is the function of DNA?

HW: Vocab: DNA, nucleic acids, genes, chromosomes, genetic code, nucleotide, bases, base sequence

Page: read pp 291-294, page 294# 2,3,4

What is DNA?

Carries the instructions for cell activities

Deoxyribonucleic acid

Nucleic Acids

DNA orRNA

Nucleotides

PhosphateSugarBase

What are these instructions?• GENES

• How did we get our genes?

Where are genes found?

Genes DNA chromosomes nucleus(Smallest) (Largest)

How does DNA make up our chromosomes?

What do our genes give us?

Our characteristics or traits

Cleft Chin

Dominant (1 copy) Recessive- 2 copies

Dimples

Dominant Recessive

Free earlobesDominant

Attached EarlobesRecessive

Face freckles dominant

No face freckles recessive

No Hitchhiker's thumb dominant

Hitchhiker's thumb recessive

Widow's peak dominant

No Widow's peak recessive

How many genes do we have?

Thousands on ______ chromosomes46

How does DNA carry the genes?

• The structure of DNA allows it to carry the genetic code

• It is a double helix made of repeating nucleotides

What is a nucleotide made of?

Deoxyribose

4 types

Subunits of DNA

What bases make up the DNA ladder rungs?

• Adenine

• Thymine

• Guanine

• Cytosine

How do the bases pair up?

All …. Teachers

Go …. Crazy

What holds the DNA base pairs together?

Weak hydrogen bonds

3 Hydrogen Bonds

2 Hydrogen Bonds

What in the DNA is unique in all organisms?

The base sequence

What part of DNA carries the genetic code?

The base sequence holds the genetic code.

Each organism has a different sequence of bases

Let’s review

1. Where is DNA found?

2. What determines our traits?

3. Where are genes located?

4. What part of DNA carries the genetic code?

Genes

ALL TEACHERS GO CRAZY