Download Journey Into dna

Name _____________________________
Period _____
Journey Into DNA
Go to the following website: www.pbs.org/wgbh/nova/genome/dna.html#
Click on the flash version of the graphic and wait for it to load. Read each paragraph
about a different aspect of DNA. Complete the worksheet section for that slide. When
you have finished reading and have answered the question(s), click on the + magnifying
glass to go to the next slide. Continue doing this until you have gone through all 15 slides.
Main page:
What is the structure of DNA?
Human body:
How many cells does the human body contain?
What is the only type of cell in the human body that contains no nucleus and
therefore no nuclear DNA?
Intestines:
Is the DNA code from cell to cell in the human body the same?
Cells:
How are new types of cells produced?
Nucleus:
The nucleus acts as the control center for the cell, what 3 jobs does it have?
Human genome:
The human genome is comprised of two sets of ________ chromosomes.
About _______% of the genome consists of sequences that have no known
function.
Within the other 3% are an estimated ___________ genes.
Chromosome:
Draw what a single chromosome looks like.
Chromosome banding:
Each of the 23 chromosome types has a ____________ ___________
___________.
Name _____________________________
Period _____
Gene:
A single gene can range in length from ________________________.
Chromatin loops:
There is a lot of DNA within the nucleus-about _________feet if you could
unravel it and stretch it out.
Chromatin scaffold:
Chromatin refers to ___________________ that help organize the long DNA
molecule.
Nucleosome:
Double helix:
Which two scientists used Rosalind Franklin’s photo 51 to piece together the
first accurate model of DNA?
The structure of DNA resembles a _____________
______________.
DNA bases:
Name the base for each abbreviation:
T=
A=
C=
G=
A always pairs up with _____________.
C always pairs up with _____________.
One nucleotide:
The sides of the DNA ladder consist of a long string of __________________
and ___________________ molecules, to which the bases are attached.
Each sugar-phosphate-base combination is called a ______________________.
Molecular structure:
How many sequences of bases exist in the human genome?
Scientists have completed determining the sequence of the human genome, what
are they working on now?