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Biology Benchmark Exam #3 2010-2011
1. In pigeons, the allele for normal feathers (F) is dominant to the allele for frizzy
feathers (f).
If a heterozygous, normal-feathered bird (Ff) is crossed with a frizzy-feathered
bird (ff), how many different feather phenotypes are possible in the offspring?
A
B
C
D
1
2
3
4
2. The distribution of chromosomes in one type of cell division is shown in the
diagram below.
Which process is represented in the diagram?
A
B
C
D
asexual reproduction
meiosis
mitosis
phagocytosis
2010-2011 Biology Benchmark Exam #3
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3. Which statement concerning all of the cells shown in the picture below is
correct?
A
B
C
D
They contain the same amount of cytoplasm.
They contain the haploid number of chromosomes.
They were formed by the process of mitosis.
They were formed by asexual reproduction
4. Which diagram below correctly illustrates the fusion of normal gametes that will
produce a human male?
sperm
2010-2011 Biology Benchmark Exam #3
egg
2
5. Which of the following is produced by meiosis?
A
B
C
D
egg cells
blood cells
kidney cells
skin cells
6. Red potato skin (R) is dominant over white potato skin (r). If a plant that is Rr is
crossed with an RR plant, which percent of their offspring do you expect to have
white skin?
A
B
C
D
100%
50%
25%
0%
7. If a pea plant has a genotype of Hhpp, what are the possible genetic
combinations that could be present in a single grain of pollen from this pea
plant?
A
B
C
D
Hp, hp
HP, hp
HP, Hp, hp
Hp, hp, hP, HP
8. Based on the chart above, what color eyes does Carrie have?
A
B
C
D
Brown
Blue
One blue and one brown
Green
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9 You have 46 chromosomes, where did they come from?
A
B
C
D
46 from your mother
46 from your father
23 from your mother, 23 from your father
0 from your parents, the chromosomes develop in the fertilized egg
10. A cross between two mice with long tails and brown fur produced the four types
of offspring listed below:




long tailed with brown fur
long tailed with white fur
short tailed with brown fur
short tailed with white fur
Which of the following best explains the results of this cross?
A
B
C
D
intermediate inheritance
gene linkage
independent assortment
crossing-over
11. If a family has already had 6 girls, what is the probability that the next child will
be a girl?
A
B
C
D
less than 50%
50%
more than 50%
close to 100%
12. A pea plant has heterozygous genes for height. According to Mendel’s law of
segregation, which example correctly shows the gamete formation in the plant?
A
B
C
D
A
B
C
D
2010-2011 Biology Benchmark Exam #3
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13. Which of the following gametes could have come from a fruit fly with genotype
rrWW?
A rW
B rr
C WW
D rw
14. Hemophilia is a recessive, X-linked genetic disorder. If a male child is born with
hemophilia and neither the mother nor the father has hemophilia, which of the
following statements is most likely true?
A the father is a carrier
B the child's sister will have hemophilia
C the mother is a carrier
D Both A and B
15. A daughter can inherit traits:
A
B
C
D
only from her mother.
only from her father.
from both her mother and her father.
from either her mother or her father, but not both.
16. Which of the following allele combinations could be found in a child when an
AaBB father is crossed with an aabb mother?
A aaBB
B AaBB
C Aabb
D AaBb
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17. As shown in the figure below, during gamete formation, alleles separate into
different gametes. This is an example of __________.
A Mendel's Law of Dominance
B Mendel's Law of Segregation
C Mendel's Law of Independent Assortment
D Darwin's Law of Inheritance
18. If a male cat has a long tail, homozygous TT, and a female cat has a bobbed tail,
homozygous tt, what are the chances that their kittens will have bobbed tails?
A There is no chance that the kittens will have bobbed tails.
B There is a 25% chance that the kittens will have bobbed tails.
C There is a 50% chance that the kittens will have bobbed tails.
D There is a 100% chance that the kittens will have bobbed tails.
19. In beans, the tall trait (T) is dominant to the short trait (t). A cross is made
between two heterozygous tall plants (Tt) and 100 seeds are produced. Calculate
the approximate number of seeds that will produce a tall plant.
A 100
B 75
C 50
D0
20. What is meiosis?
A
B
C
D
a type of cellular division in which the number of chromosomes double
a type of cellular division in which the number of chromosomes is reduced by half
a stage in asexual reproduction
a type of cell division used for growth and repair
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21. Meiosis and mitosis are the two major types of cell division in organisms that
reproduce sexually. Which of the following is a major difference between
meiosis and mitosis?
A meiosis results in half the number of cells, mitosis results in double the number of
cells
B meiosis occurs in prokaryotes, mitosis occurs in eukaryotes
C meiosis produces gametes, mitosis produces somatic cells
D meiosis replicates DNA in the cell, mitosis replicates RNA in the cell
22. In peas, green leaves (G) are dominant to white leaves (g). A genetic cross is made
between a heterozygous dominant (Gg) male plant and a homozygous recessive
(gg) female plant and 200 seeds are produced. How many of the seeds would you
expect to result in plants with green leaves?
A 200
B 100
C 50
D none
2010-2011 Biology Benchmark Exam #3
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Biology Benchmark Exam #3 2010-2011
Answer Key
1) B
2) B
3) B
4) D
5) A
6) D
7) A
8) A
9) C
10) C
11) B
12) D
13) A
14) C
15) C
16) D
17) B
18) A
19) B
20) B
21) C
22) B
2d
2a
2b
2f
2a
3a
2c
2g
2e
3b
2f
3b
2c
3a
2e
2d
3b
2g
3a
2a
2b
3a
2010-2011 Biology Benchmark Exam #3
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