Chapter 13: Meiosis and Sexual Life Cycles

Get a hint

Click the card to flip 👆

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.
D) Force the plant to self-pollinate to obtain an identical one.

Click the card to flip 👆

1 / 48

Which of the following statements is correct in comparing sexual and asexual reproduction?
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.

At which stage of mitosis are chromosomes usually photographed in the preparation of a karyotype?
A) prophase
B) metaphase
C) anaphase
D) interphase

Which of the following statements is true of a species that has a chromosome number of 2n = 16?
A) The species is diploid with 32 chromosomes per cell.
B) The species has 16 sets of chromosomes per cell.
C) Each diploid cell has eight homologous pairs of chromosomes.
D) A gamete from this species has four chromosomes.

Eukaryotic sexual life cycles show tremendous variation. Which of the following characteristics do all sexual life cycles have in common?

I. Alternation of generations
II. Meiosis
III. Fertilization
IV. Gametes
V. Spores

A) I, II, and IV
B) II, III, and IV
C) II, IV, and V
D) I, II, III, IV, and V

Which of the following processes occurs in a plant's sexual life cycle?
A) sporophytes produce gametes by meiosis
B) gametophytes produce gametes by mitosis
C) gametophytes produce gametes by meiosis
D) sporophytes produce gametes by mitosis

Which of the following statements describes an example of alternation of generations?
A) A grandparent and grandchild each have dark hair, but the parent has blond hair.
B) A diploid plant (sporophyte) produces a spore by meiosis that gives rise to a multicellular, haploid pollen grain (gametophyte).
C) A diploid animal produces gametes by meiosis, and the gametes undergo fertilization to produce a diploid zygote.
D) A haploid mushroom produces gametes by mitosis, and the gametes undergo fertilization, which is immediately followed by meiosis.

A particular organism has 46 chromosomes in its karyotype. Which of the following statements is correct regarding this organism?
A) It must be human.
B) It must be an animal.
C) It reproduces sexually.
D) It produces gametes with 23 chromosomes.

A triploid cell contains three sets of homologous chromosomes. If a cell of a diploid species that normally has 42 chromosomes per cell is triploid, this cell would be expected to have which of the following sets of chromosomes?
A) 63 chromosomes in 31 1/2 pairs
B) 63 chromosomes in 21 sets of 3
C) 63 chromosomes, each with 3 sister chromatids
D) 21 chromosome pairs and 21 unique chromosomes

Which of the following processes might produce a human zygote with 45 chromosomes?
A) an error in meiotic anaphase occurring in either an egg or sperm
B) failure of the egg nucleus to be fertilized by the sperm
C) failure of an egg to complete meiosis II
D) incomplete cytokinesis during spermatogenesis after meiosis I

In a human karyotype, chromosomes are arranged in 23 pairs. If we choose one of these pairs, such as pair 14, which of the following do the two chromosomes of the pair have in common?
A) length and position of the centromere only
B) length, centromere position, and staining pattern only
C) length, centromere position, staining pattern, and traits coded for by their genes
D) They have nothing in common except that they are X-shaped.

Which of the following characteristics do homologous chromosomes exhibit?
A) They carry information for different traits.
B) They carry information for the same traits.
C) They carry the same alleles.
D) They align on the metaphase plate in meiosis II.

Chapter 13: Meiosis and Sexual Life Cycles

Students also viewed