BIO 171 EXAM 3 COMPREHENSIVE QUESTIONS
AND CORRECT ANSWERS
◉ A human cell containing 22 autosomes and a Y chromosome is
__________________
a. a sperm
b. an egg
c. a zygote
d. a somatic cell of a male.
Answer: a. a sperm
◉ Quaking aspen trees usually reproduce by extending underground
stems that then push aboveground and grow into trees. Sexual
reproduction is not as common, but when it does happen, the
haploid gametes have 19 chromosomes. How many chromosomes
are in the cells of the underground stem?
a. 9
b. 19
c. 38
d. 76.
,Answer: c. 38
◉ Which of the following statements about reproduction is correct?
a. asexual reproduction, but not sexual reproduction, is
characteristic of only plants and fungi
b. in sexual reproduction, individuals transmit half of their nuclear
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. in sexual reproduction, individuals transmit half of their
nuclear genes to each of their offspring
◉ Asexual reproduction occurs during which of the following
processes?
a. meiosis
b. mitosis
c. fertilization.
Answer: b. mitosis
, ◉ Many organisms spend most of their life cycle in the diploid state.
If meiosis produces haploid cells, how is the diploid number
restored by these types of organisms?
a. by DNA replication
b. through the transcription of DNA to RNA
c. by synapsis of the homologous pairs of chromosomes during
prophase of meiosis 1
d. by fertilization.
Answer: d. by fertilization
◉ Which of the following statements describes a major difference
between meiosis II and mitosis in a diploid animal?
a. homologous chromosomes align at the metaphase plate in meiosis
II but not in mitosis
b. meiosis II occurs in a haploid cell, while mitosis occurs in diploid
cells
c. crossing over of chromosomes takes place in meiosis II but not in
mitosis.
Answer: c. crossing over of chromosomes takes place in meiosis II
but not in mitosis
AND CORRECT ANSWERS
◉ A human cell containing 22 autosomes and a Y chromosome is
__________________
a. a sperm
b. an egg
c. a zygote
d. a somatic cell of a male.
Answer: a. a sperm
◉ Quaking aspen trees usually reproduce by extending underground
stems that then push aboveground and grow into trees. Sexual
reproduction is not as common, but when it does happen, the
haploid gametes have 19 chromosomes. How many chromosomes
are in the cells of the underground stem?
a. 9
b. 19
c. 38
d. 76.
,Answer: c. 38
◉ Which of the following statements about reproduction is correct?
a. asexual reproduction, but not sexual reproduction, is
characteristic of only plants and fungi
b. in sexual reproduction, individuals transmit half of their nuclear
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. in sexual reproduction, individuals transmit half of their
nuclear genes to each of their offspring
◉ Asexual reproduction occurs during which of the following
processes?
a. meiosis
b. mitosis
c. fertilization.
Answer: b. mitosis
, ◉ Many organisms spend most of their life cycle in the diploid state.
If meiosis produces haploid cells, how is the diploid number
restored by these types of organisms?
a. by DNA replication
b. through the transcription of DNA to RNA
c. by synapsis of the homologous pairs of chromosomes during
prophase of meiosis 1
d. by fertilization.
Answer: d. by fertilization
◉ Which of the following statements describes a major difference
between meiosis II and mitosis in a diploid animal?
a. homologous chromosomes align at the metaphase plate in meiosis
II but not in mitosis
b. meiosis II occurs in a haploid cell, while mitosis occurs in diploid
cells
c. crossing over of chromosomes takes place in meiosis II but not in
mitosis.
Answer: c. crossing over of chromosomes takes place in meiosis II
but not in mitosis
