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Genetics Practice 3
Test Description: Practice for our science test!
Instructions: Answer all questions to get your test result.
1) Trure or False? Asexual reproduction requires only 1 parent.
A
True
B
False
2) True or False? In asexual reproduction, the offspring is identical to the parent.
A
True
B
False
3) True or False? Sexual reproduction requires 1 parent.
A
True
B
False
4) True or False? With sexual reproduction, the offspring are different from the parent.
A
False
B
True
5) When two desirable traits are crossed, such as sweet grapes crossed with seedless grapes to produce sweet, seedless grapes, this is an example of
A
selective breeding.
B
asexual reproduction.
C
self pollination.
D
heterozygous.
6) A baby mouse is born with a black coat. Black is the dominant color. What genes did the baby bear received from its parents?
A
Dominant black gene from one parent and a recessive white gene from the other parent
B
Dominant black gene from one parent and no gene from the other parent
C
Recessive white gene from one parent and recessive white gene from the other parent
D
Recessive white gene from one parent and no gene from the other parent
7) A heterozygous black cat is crossed with a white cat. Black fur is dominant over white. What is the probability that an offspring will have black fur? (Make a Punnett Square)
A
25%
B
50%
C
75%
D
100%
8) Traces the occurrence of a trait through generations of a family.
A
Timeline
B
Pedigree
C
Punnett Square
D
Family Tree
9) Male chromosomes are represented by...
A
XY
B
XX
10) True or False? The 3 components of a nuleotide are a base, a phosphate group and a sugar.
A
False
B
True
11) Who proposed the double helix model of DNA?
A
Gregor Mendel
B
James Watson and Francis Crick
C
Barbara McClintock
D
George Beadle
12) Adenine always pairs with ___________ in DNA.
A
Cytosine
B
Guanine
C
Thymine
13) Cytosine always pairs with __________ in DNA.
A
Guanine
B
Thymine
C
Adenine
14) Describe the structure of DNA.
A
A trapezoid.
B
A twisted ladder.
C
A crazy eight.
D
A parallelogram.
15) True or False? A ratio is an expression that compares two quantities.
A
True
B
False
*select an answer for all questions
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