Campbell Biology in Focus, 2e (Urry) Chapter 10 Meiosis and Sexual Life Cycles Test Bank(100% Correct)
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Course
Campbell Biology
Institution
Campbell Biology
If a horticulturist breeding gardenias succeeds in having a single plant with a particularly
desirable set of traits, which of the following would be her most probable and efficient route to
establishing a line of such plants?
A) Backtrack through her previous experiments to obtain another plant...
Campbell Biology in Focus, 2e (Urry)
Chapter 10 Meiosis and Sexual Life
Cycles Test Bank(100% Correct)
If a horticulturist breeding gardenias succeeds in having a single plant with a particularly
desirable set of traits, which of the following would be her most probable and efficient route to
establishing a line of such plants?
A) Backtrack through her previous experiments to obtain another plant with the same traits.
B) Breed this plant with another plant with much weaker traits.
C) Clone the plant asexually to produce an identical one.
D) Force the plant to self-pollinate to obtain an identical one. - ANSWER C
Which of the following descriptions correctly defines a genome?
A) representation of a complete set of a cell polypeptides
B) the complete set of an organism polypeptides
C) a karyotype
D) the complete set of an organism's genes - ANSWER D
Which of the following is the smallest unit that would contain a complete copy of the entire
human genome?
A) one human somatic cell
B) one human chromosome
C) all of the DNA of one human
D) one human gene - ANSWER A
If an organism is diploid and a certain gene found in the organism has 18 known alleles
(variants), then any given organism of that species can/must have which of the following?
A) at most, 2 alleles for that gene
B) up to 18 chromosomes with that gene
,C) up to 18 genes for that trait
D) up to, but not more than, 18 different traits - ANSWER A
Which of the following is a true statement about sexual versus asexual reproduction?
A) Asexual reproduction, but not sexual reproduction, is characteristic of plants and fungi.
B) In sexual reproduction, individuals transmit 50% of their genes to each of their offspring.
C) In asexual reproduction, offspring are produced by fertilization without meiosis.
D) Asexual reproduction produces only haploid offspring. - ANSWER B
Referring to a plant's sexual life cycle, which of the following processes leads directly to the
formation of gametes?
A) sporophyte meiosis
B) gametophyte mitosis
C) gametophyte meiosis
D) sporophyte mitosis - ANSWER B
Which of the following is an example of alternation of generations?
A) A diploid plant (sporophyte) produces, by meiosis, a spore that gives rise to a multicellular,
haploid pollen grain (gametophyte).
B) A diploid animal produces gametes by meiosis, and the gametes undergo fertilization to
produce a diploid zygote.
C) A haploid mushroom produces gametes by mitosis, and the gametes undergo fertilization,
which is immediately followed by meiosis.
D) A diploid cell divides by mitosis to produce two diploid daughter cells, which then fuse to
produce a tetraploid cell. - ANSWER A
The human X and Y chromosomes
A) are both present in every somatic cell of males and females alike.
B) are about the same size and have approximately the same number of genes.
C) are almost entirely homologous, despite their different names.
, D) include genes that determine an individual's sex. - ANSWER D
Which of the following describes a karyotype?
A) a natural cellular arrangement of chromosomes in the nucleus
B) a display of all the cell types in an organism
C) organized images of a cell's chromosomes
D) a display of a cell's mitotic stages - ANSWER C
At which stage of mitosis are chromosomes usually photographed in the preparation of a
karyotype?
A) prophase
B) metaphase
C) anaphase
D) telophase - ANSWER B
Which of the following is true of a species that has a chromosome number of 2n = 16?
A) The species has 16 sets of chromosomes per cell.
B) Each cell has eight homologous pairs.
C) During the S phase of the cell cycle there will be 32 separate chromosomes.
D) A gamete from this species has four chromosomes. - ANSWER B
Eukaryotic sexual life cycles show tremendous variation. Which of the following elements do
all sexual life cycles have in common?
I. alternation of generations
II. meiosis
III. fertilization
IV. gametes
V. spores
A) I, IV, and V
B) I, II, and IV
C) II, III, and IV
D) II, IV, and V - ANSWER C
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