Genes
and
DNA

DNA Brain Pop Video
THE BLUEPRINT OF LIFE
 Every
cell in your body has the
same “blueprint” or the same
DNA. Just like the blueprints of a
house tell builders how to
construct the house, the DNA
“blueprint” tells the cell how to
build the organism.
This and the next slide are from:
biologycorner.com/worksheets/KNAcoloring.html
 Yet,
how can a heart be so different from
a brain if all the cells contain the same
instructions?
 Although
much work remains in genetics,
it has become apparent that a cell has the
ability to turn off most genes and only work with
the genes necessary to do a job.
 There
is a theory that a lot of DNA is nonsense
and codes for nothing!
 These
regions of DNA that do not code for proteins
are sometimes called “junk DNA”.
WHAT IS A GENE?
A
gene is a segment
or small part of DNA
that is located on a
chromosome and
that codes for a
specific hereditary
trait.
WHAT IS DNA AND WHERE IS IT FOUND?
DNA stands for deoxyribonucleic acid and is the chemical that
genes are made of. DNA is the genetic instructions for how a plant
or animal will look. What traits will it have inherited?
It is found in most nuclei which is why it is called a nucleic acid.
DNA can also be found in mitochondria AND some chloroplasts.
Genetics 101:
What is a Gene?
Genetics 101:
What are SNPs?
WHAT ARE THE FOUR BASES IN THE
DNA STRUCTURE?
At The Girl's Club = AT + GC
Adenine pairs with Thymine
Guanine pairs with Cytosine
OR
All Tigers Can Growl
Adenine pairs with Thymine
Cytosine pairs with Guanine
James Watson Explains
Base Pairing
DNA Replication Video
WHAT IS THE FUNCTION OF GENETIC CODE?
Genetic code is the sequence the
DNA proteins are ordered in. This code
determines our traits. It is like the
recipe of how we are made.