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Deoxyribonucleic acid

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by

Jennifer Sweet

on 13 January 2016

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Transcript of Deoxyribonucleic acid

deoxyribonucleic acid
Also known as: DNA!!!
Deoxyribonucleic acid
DNA is what makes you...YOU!

We call this your ___________________.

You have many traits... and DNA makes all of them!
There are 3 types of traits:

where is it?
DNA is found in every single one of your cells.

DNA is found inside of the cell _______________________________

in structures called _______________________________
.










Let's think about this...why are there 23 in our sex cells?



Therefore, why are there 46 in our body cells?
DNA = traits
Chromosomes are divided into _____________.

Genes are sections of ______________.

You have about 40,000 different genes.

Each gene correlates to a trait.

*However, some traits are determined by multiple genes.
who has DNA?
Every living thing on the planet contains DNA.
This includes humans, plants and even bacteria!
DNA Summary
DNA: Organization & Location
what does it look like?
DNA is made up of small chemicals called __________________.

There are 4 different types of nucleotides in a strand of DNA.

The
order
of these nucleotides in a gene (or section of DNA) determine what type of trait that gene produces.
Adenine,

DNA Structure
Take a look at the picture again.
Do you notice a pattern here?
Super Important!!!
Cool Shape!
These 46 long DNA strands have to fit in the nucleus.

That is why they wrap around themselves (or coil up) in the shape of a chromosome.

But, if you unwind one of these chromosomes - you get a spiral staircase type shape - called a

_____________________________________!
exit ticket OR do now
DNA replication
www.newpathlearning.com/MML/DNA/files/ChromoLab. swf
What is it?
TRAITS
* Physiological: How you work!
* Behavioral: How you act.
* Physical: What you look like.
Our sex cells (egg and sperm) only have _______.
Our body cells have ______chromosomes.
nucleus
CHROMOSOMES
46
23
DOUBLE HELIX
genes
DNA
NUCLEOTIDES
Cytosine
Guanine,
&
Thymine,
think:

What would happen if these nucleotides were somehow switched?
(Also known as a
mutation
.
)
Causes of
mutation
:
1. Random
.
* Explain: ________________________________________
2. Environmental Factors.
* Examples: ______________________________________
3. Genetic Engineering.

* Explain: _________________________________________
* Examples: ______________________________________
nucleotides are switched by chance!
pollution, radiation, diet
Humans change DNA in a lab.

cloning, GMO foods, de-extinction
THINK!
23 (egg) + 23 (sperm) = 46 chromosomes!
(fertilization)
The resulting cell (zygote) copied itself many times to form... a baby!
A
is always next to....
T
is complementary to...
G
is complementary to...
C
is a base pair with...
is a base pair with...
Something Bad.
Something Good.

Nothing AT ALL!
welcome back!
DO NOW #1:
help pass out materials.
DO NOW #2:
Grab NEW yellow folder.
LABEL IT:
DNA & GE
Assessments
Activities
DO NOW #3:
Hand in "old" yellow folders.
cell
nucleus
chromosome
DNA!
gene
trait
body
double helix
WHY?
why is it important to know/learn about DNA?
Directions:
Color all of these shapes
GREEN
Color all of these shapes
PINK
Color all of these shapes
YELLOW
Color all of these shapes
BLUE
part 1:
part 2:
Label all
GREEN
shapes "A"
Label all
PINK
shapes "T"
Label all
YELLOW
shapes "G"
Label all
BLUE
shapes "C"
a base pair!
http://learn.genetics.utah.edu/content/molecules/
great resource!
example:
ATTGCATTG
This gene codes for hair color.
=
brown
hair
ATAGCATTG
=
blonde
hair
Full transcript