EXAM 2
BIOLOGY 111
Dr.
Richard Brugam
2/12/98
1. If
you enter a field of peas and you see purple pea plants, what is the genotype
of these peas?
a. WW b. ww c. Ww d. Either WW or
Ww - we can’t tell
2. Crossing
over occurs when:
a. Parts
of chromosomes are exchanged between homologous chromosomes at meiosis
b. Part
of chromosomes are exchanged between homologous chromosomes at mitosis
c. A
male fruit fly becomes a female
d. Calico
cats are produced
3. A
woman who is a carrier for color blindness marries a man with normal
vision. What fraction of her sons will
be colorblind?
a. ¼ b. ½ c. d. All sons
will be colorblind
4. The
function of the cell membrane is:
a. To
store energy c. To control what substances enter and leave
the cell
b. To
control cell function d. To control reproduction of the cell
5. Chloroplasts
are the site of
a.
Protein synthesis
b. Photosynthesis c. Respiration
6. When
you cross a red snapdragon with a white one, you get pink snapdragons. Why?
a. There
is a blending of the genes
c. There is incomplete dominance
in snapdragon flower color
b.
White is dominant to red d. Red is dominant to white
7. If
the cell nucleus is the “control center” for the cell, how can prokaryotes
function without one?
a. They
are so simple that cell function can proceed without any controls
b. The
control function of the nucleus is performed by genetic material that is not
organized into a nucleus
c. Prokaryotes
are controlled from outside
d. Prokaryotes
are part of the body and are controlled by the brain
8. What
two structures are present in plant cells but not in animal cells?
a.
Cell membranes and cell walls c. Chlorophyl and cell walls
b. Chloroplasts
and cell walls d. Mitochondria and Golgi apparatus
9. What
does a mitochondrion do?
a. Carries
the cell’s genetic information c. Allows the cell to reproduce
b. Produces
useful energy from sugar molecules d. Allows the cell to move
10. The particular genetic constitution of an
organism is called the
a.
Phenotype b. Genotype c. Homozygote d. Heterozygote
11. The outward appearance of a trait is the
a. Genotype
b. Phenotype c. Homozygote
d. Heterozygote
12. Mendel found that traits in organisms are
determined by discrete units called
a.
Genes b. Oncogenes c. Chromosomes d. Chromatids
13. The traits that seem to skip a generation,
appearing only in grandparents and grandchildren are called ______.
a.
Dominant traits
b. Recessive traits c. Lethal traits
d. Oncogenes
14. When two versions of a gene are possible (say
purple and white in peas), we call them
a.
Codons b. Phenotypes c. A linkage
group d. Alleles
15. Are you haploid?
a.
Yes b. No
c. Maybe d. No, I have a few haploid sex cells, but mostly I’m diploid
16. If Mendel takes the progeny of the cross
between purple and white peas and crosses them and they produce 100 offspring,
how many offspring are likely to be white?
a.
100 b. 50 c. 25 d.
0
17. A goldfish has a diploid number of 94. Its haploid number is
a.
2 b. 94 c. 47 d.
188
18. The diploid number of a mosquito is 3.
a.
True b. False
19. When certain genes tend to stay together and
appear together in offspring, they are said to be:
a.
Mutants b. Linked c. Sex-linked d. Pleiotropic
20. Chromosomes appear in a cell during
a. Meiosis
and mitosis c. The normal day-to-day activities of a cell
b. The
production of starches d. The night
21. Both eggs and sperm are gametes.
a.
True b. False
22. The metaphase plate is:
a.
The diaphragm c. The plane on which the chromosomes line up
at anaphase
b. Where
the chromosomes go d. The plane on which the chromosomes line up
at metaphase
23. Chromatids are:
a. Chromosomes
b. The
“handle” in the middle of a chromosome that allows it to be dragged to one end
of the cell during meiosis
c. The
“arms” on the chromosomes
24. Hämmerling’s Acetabularia experiment
demonstrated that
a. Acetabularia is an alga
b. The
nucleus controls the development of the organism’s physical characteristics
c. Cell
nucleii perform no function in the life of the organism
d. Cell
nucleii control the development of chloroplasts
25. Chloroplasts are normally a particular
color. What is that color?
a. Red
b. Blue c. Yellow d. Green