ch 13 bio final

Which of the following statements is true of a species that has a chromosome number of 2n = 16?

Each diploid cell has eight homologous pairs of chromosomes.

Refer to the drawings in the figure (on Question 23) of a single pair of homologous chromosomes as they might appear during various stages of either mitosis or meiosis, and answer the following question. Which diagram represents anaphase II of meiosis?

V

Which of the following events happens at the conclusion of meiosis I?

Homologous chromosomes of a pair are separated from each other.

Refer to the drawings in the figure below of a single pair of homologous chromosomes as they might appear during various stages of either mitosis or meiosis, and answer the following question. Which diagram represents anaphase I of meiosis?

I

Refer to the life cycles illustrated in the figure below to answer the following question. Which of the life cycles is typical for animals?

I only

For the following questions, match the key event of meiosis with the stages listed below. I. Prophase I V. Prophase II II. Metaphase I VI. Metaphase II III. Anaphase I VII. Anaphase II IV. Telophase I VIII. Telophase II Homologous chromosomes are aligned at the equator of the spindle.

II

Refer to the life cycles illustrated in the figure in Question 10 to answer the following question. Which of the life cycles is typical for plants and some algae?

II only

) Eukaryotic sexual life cycles show tremendous variation. Which of the following characteristics do all sexual life cycles have in common? I. Spores II. Meiosis III. Fertilization IV. Gametes

II, III, and IV

Refer to the life cycles illustrated in the figure in Question 10 to answer the following question. Which of the life cycles is typical for most fungi and some protists?

III only

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

In sexual reproduction, individuals transmit half of their nuclear genes to each of their offspring.

A particular organism has 46 chromosomes in its karyotype. Which of the following statements is correct regarding this organism?

It produces gametes with 23 chromosomes.

Which of the following characteristics do homologous chromosomes exhibit?

They carry information for the same traits.

For the following questions, match the key event of meiosis with the stages listed below. I. Prophase I V. Prophase II II. Metaphase I VI. Metaphase II III. Anaphase I VII. Anaphase II IV. Telophase I VIII. Telophase II Centromeres of sister chromatids disjoin and chromatids separate.

VII

Which of the following processes occurs in a plant's sexual life cycle?

gametophytes produce gametes by mitosis

) 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?

length, centromere position, staining pattern, and traits coded for by their genes

Which of the following processes occurs in meiosis but not in mitosis?

synapsis of chromosomes

Which of the following statements defines a genome?

the complete set of an organism's genes and other DNA sequences

Which of the following statements describes an example of alternation of generations?

A diploid plant (sporophyte) produces a spore by meiosis that gives rise to a multicellular, haploid pollen grain (gametophyte).

Which of the following processes occurs when homologous chromosomes cross over in meiosis I?

Corresponding segments of non-sister chromatids are exchanged.

Which of the following statements describes the chromosomal makeup of each daughter cell after telophase of meiosis I?

The cells are haploid, and the chromosomes are each composed of two chromatids.

How do cells at the completion of meiosis compare with cells that are in prophase of meiosis I?

The cells have half the number of chromosomes and one-fourth the amount of DNA.

In a life cycle such as that shown in part II of the figure above, if the zygote's chromosome number is ten, which of the following statements will be true?

The sporophyte's chromosome number per cell is ten and the gametophyte's is five.

Which of the following processes might produce a human zygote with 45 chromosomes?

an error in meiotic anaphase occurring in either an egg or sperm

During which of the following processes do sister chromatids separate from each other?

during both mitosis and meiosis II

When chiasmata can first be seen in cells using a microscope, which of the following processes has most likely occurred?

prophase I