Today in Biology
Week #5 Quarter 2 (11/12/13)
Biology Learning Goal: Overview of
chapter 6 – Genes, DNA,
Chromosomes and chromatids
Warm Up Question:
How is DNA
Arranged?
Shape?
To Do Today:
notebook paper
Lab report directions Due Nov 19
Finish coloring DNA
Video on Genetics and DNA summary
Homework: Lab
report Due Nov
19 one week!
Fact of the Day
The right half
of the brain
controls the left
side of our body
muscles, and the
left controls the
right
P
P
P
Today in Biology
Week #5 Quarter 2 (11/13/13)
Biology Learning Goal: Overview of
chapter 6 – Genes, DNA,
Chromosomes and chromatids
Warm Up Question:
1. In DNA adenine pairs with
__ and guanine pairs with __
2. What makes up the DNA
sides?
Homework: Lab
report Due Nov
19 one week!
Fact of the Day
At the ocean's
deepest point,
due to immense
pressure, an
iron ball would
take more than
To Do Today:
an hour to sink
Finish video summary – turn into box to the ocean
Begin notes on DNA
floor.
Organize notebook and check
HISTORY OF
GENETICS AND
DNA
DEOXYRIBONUCLEIC ACID
DNA
Structure
handout (s)
5
DNA
structure
6
Page 1
Introduction to DNA
DNA
1. What is genetics?
2. 1/3 of the recipe for a human being is the same as a
______.
3. 2/3 of our recipe is shared with ______.
4. Basic building block of life is the _____.
5. _____ carries the recipe for life.
6. What are genes?
7. What is genotype?
8. What is phenotype?
9. How long is all our DNA if we could stretch it out?
10. If we were to print a paper with A’s, T’s, G’s and C’s
making our genetic code how many pages would it be?
How many letters?
Analysis of genetics and structure of DNA
http://www.dnatube.com/video/2341/Genetics--The-structure-of-DNA--PART-1
Genes Genetics and DNA video
DNA HISTORY



An experiment in 1928 by Frederick
Griffith:
He removed DNA from one type of
bacteria & put it into a 2nd type of
bacteria.
The 2nd bacteria took on the
characteristics of the 1st bacteria.
QUESTION # 1
WHAT DID GRIFFITH’S EXPERIMENT
INDICATE ABOUT DNA?
Page 31
AND THE ANSWER IS….
DNA CARRIES THE GENETIC
INFORMATION THAT DICTATES AN
ORGANISMS CHARACTERISTICS.
Page 31
THE STRUCTURE OF DNA
•In 1953, James Watson
and Francis Crick were
accredited to
discovering the
structure of DNA.
•Watson, Crick, and
Maurice Wilkins were
awarded the Nobel Prize
for Physiology and
But should they have
Medicine in 1962.
received the credit???
Rosalind Franklin
•Franklin
refined the technique
of X-ray crystallography to study
DNA and produced the famous
photo 51.
•From photo 51 she determined
that DNA had to be a double
helix.
•Her partner, Maurice Wilkins,
shared photo 51 with Watson &
Crick, who published the results
before Franklin.
•Franklin died in 1958.
http://www.youtube.com/watch?v=JiME-W58KpU
DNA is wound up in tight
chromosomes which are located in
the nucleus
Its shape is a twisted double helix
• DNA is genetic
material that carries
information about an
organism and is
passed from parent
to offspring.
(Blueprint of life)
• Found in the nucleus
of cells.
• Tightly coiled DNA
makes chromatin &
chromatin makes
chromosomes.
•Every organism’s DNA is
different except clones &
identical twins.
•DNA contains the genetic
code of the organism - the
instructions that tell the
cell and the whole living
thing what proteins to
produce. The proteins that
a cell makes control what
that cell does - the cell's
function. This code is
based on the code from
that organism's parents.
DNA is made of
chemical building
blocks called
nucleotides. These
building blocks are
made of three parts:
a phosphate group, a
sugar group and one
of four types of
nitrogen bases. To
form a strand of DNA,
nucleotides are linked
into chains, with the
phosphate and sugar
groups alternating.
The structure of DNA is a
twisted double helix (twisted
ladder).
•
Adenine always
pairs with
Thymine
A-T or T-A
Cytosine always
pairs with
Guanine
G-C
or C-G
Nitrogen
There are two kinds of nitrogencontaining bases - purines and
pyrimidines.
BasesPurines:
•Adenine and Guanine
•Purines are the larger of the two
types of bases found in DNA
Pyrimidines:
•Cytosine and Thymine
•Adenine and guanine are found
in both DNA and RNA
Today in Biology
Week #5 Quarter 2 (11/13/13)
Biology Learning Goal: Overview of
chapter 6 – Genes, DNA,
Chromosomes and chromatids
Warm Up Question: reflection!
Who are James Watson and
Francis Crick?
Who is Rosalind Franklin?
To Do Today:
Discuss notes
Handouts on page 16 and 17 complete
Homework:
Lab report Due
Nov 19 Tuesday
Fact of the Day
Eighty-five
percent of all
the plants
and animals
live in the
sea.
Handouts
pg. 16
and
pg. 17
complete by Monday