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Fall Semester Exam
Test Description: Fall Semester Exam 2008-2009
Instructions: Answer all questions to get your test result.
1) A star is born when
A
a protostar begins to cool
B
helium and oxygen combine
C
nuclear fusion starts
D
a nebula expands
2) A geneticist uses pedigrees to
A
prove that sex linked traits are caused by dominant alleles
B
trace the inheritance of traits through generations of families
C
create genetic crosses
D
replicate DNA
3) Waves are classified according to
A
how they travel
B
their source
C
their shape
D
their size
4) What happens during meiosis?
A
chromosome pairs separate to form new sex cells
B
each sex cell loses half of its chromosomes
C
each sex cell copies itself to form four new chromosomes
D
chromosome pairs remain together when new sex cells are formed
5) Down syndrome occurs most often when
A
sickle shaped cells become stuck in blood vessels
B
blood fails to clot properly
C
a person inherits a recessive allele
D
chromosomes fail to separate properly during meiosis
6) In which direction(s) do seismic waves travel from their point of origin?
A
toward Earth\'s core only
B
in all directions
C
north to south only
D
toward the equator only
7) At the full moon, the combined gravitational pulls of the sun and moon produce the biggest difference between low and hight tide, called
A
spring tide
B
surface current
C
rip current
D
neap tide
8) Why are sex linked traits more common in males than in females?
A
all alleles on the Y chromosome are recessive
B
all alleles on X chromosomes are dominant
C
a recessive allele on the X chromosome will produce the trait in a male
D
any allele on the Y chromosomee will be codominant with the matching allele on the X chromosome
9) One piece of evidence that supports the big bang theory is the observation that most galaxies are moving
A
toward our galaxy
B
in random
C
away from one another
D
toward one another
10) Stars are classified according to their
A
distance, size, color
B
size, distance, brightness
C
color, brightness, temperature
D
size, brightness, temperature
*select an answer for all questions
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