Transcript 7B Warm-Up Monday, November 10, 2008 #25

7B Warm-Up
Monday, March 2, 2009
#11
After a recent serious illness, Neh Neh had some blood work
done. It was discovered that her T-cell or lymphocyte count was
low. T-cells are the cells in blood that allow your immune system
to fight off infection. In seven samples of blood there are 168 Tcells. This is after a total of 7 cells were removed for testing.
How many T-cells were in each sample to start?
a. 15
b. 25
c. 50
d. 65
Answer: 3/2/09
B. 25
7x – 7 = 168
7B Warm-Up
Tuesday, March 3, 2009
#12
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“Stronger” traits are
called_____________.
“Weaker” traits are
called _____________.
Geneticists use
_________ to
represent the different
forms of a gene.
Answer: 3/3/09

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DOMINANT
recessive
letters
R
R
r
Rr
Rr
r
Rr
Rr
7B Warm-Up
Wednesday, March 4, 2009
#13
DNA is made of subunits called _____________.
Answer: 3/4/09

nucleotides
7B Warm-Up
Thursday, March 5, 2009
#14
Nucleotides are identical except for the
base. Name the 4 bases.
1.
2.
3.
4
Answer: 3/5/09
1.
2.
3.
4.
Adenine
Thymine
Guanine
Cytosine
7B Warm-Up
Thursday, March 6, 2009
#15
Which of the following best describes the structure of DNA?
A. DNA has two strands that form a branched chain called a
branched helix.
B. DNA is in the shape of a twisted ladder called a double helix.
C. DNA is in the shape of a straight ladder called a straight helix.
D. DNA has three strands that form a triple helix.
Answer: 3/6/09
B.DNA is in the shape of a twisted ladder called a double
helix.