Cell division

If the cell of a diploid organism (2n = 6) undergoes meiosis, how many chromosomes are present in each daughter cell at the end of meiosis II? a. 24 b. 12 c. 18 d. 6 e. 3

3

If the cell of a diploid organism (2n = 6) undergoes meiosis, how many different chromosome homologs are present in each daughter cell at the end of meiosis I? a. 12 b. 6 c. 24 d. 3 e. 18

3

If the cell of a diploid organism (2n=4) undergoes mitosis, how many chromosomes are present in each daughter cell? a. 4 b. 16 c. 1 d. 8 e. 2

4

____ is a special type of cell division that makes gamete cells for sexual reproduction. a. Miosis b. Metaphase c. Mitosis d. Meiosis e. Cytokinesis

Meiosis

A scientist is studying an organism with a mutation which reduces the efficiency of tetrad formation. This defect would most likely affect the ability to: a. Duplicate centrosomes b. Breakdown the nuclear membrane c. Align a homologous chromosome at the metaphase plate d. Establish spindle poles e. Assemble spindle microtubules

align a homologous chromosome at the metaphase plate

This emanates from the centrosome to position the mitotic spindle within the cell. a. Astral microtubule b. Centromere c. Kinetochore microtubule d. Spindle pole

astral microtubule

The organelle that serves as a microtubule organizing center during cell division is the a. Chromomere b. Cytoskeleton c. Centrosome d. Centromere e. Chromosome

centrosome

Which of the following statements is NOT true of meiosis? a. Centrosome duplication occurs during interphase. b. Chromosomes decondense during telophase I. c. Kinetochore proteins assemble on chromosomes during prophase I. d. Spindle microtubule tension on each tetrad is balanced at metaphase. e. Crossing over occurs during anaphase I.

crossing over occurs during anaphase |

The protein structure on a chromosome to which microtubules may attach is an a. Chromatin b. Arm c. Telomere d. Centrosome e. Kinetochore

kinetochore

The primary type of microtubule that positions the chromosome in preparation for mitosis is a. Kinetochore microtubule b. Tethering microtubule c. Astral microtubule d. Polar microtubule

kinetochore microtubule

Chromosomes are maximally condensed at this step. a. Prophase b. Interphase c. Anaphase d. Metaphase e. Prometaphase

metaphase

Part of the cell cytoskeleton, these are a major component of the mitotic spindle. a. Chromosome b. Centrosome c. Kinetochore d. Microtubules e. Spindle poles

microtubules

After meiosis I, each daughter cell contains: a. one chromosome of each homolog. b. four chromatids of each chromosome. c. one homolog of each homologous pair of chromosomes. d. one chromatid of each chromosome. e. one chromatid of each homolog.

one homolog of each homologous pair of chromosomes.

During this step, the nuclear membrane breaks down. a. Prophase b. Anaphase c. Interphase d. Prometaphase e. Metaphase

prometaphase

Crossing over occurs during which phase of meiosis? a. Prophase II b. Prophase I c. Interphase II d. Interphase e. Prometaphase II

prophase |

Which of the following meiosis II events are correctly ordered? a. Replication, chromosome condensation, metaphase II, cytokinesis b. Metaphase II, kinetochore assembly, anaphase II, cytokinesis c. Centrosome duplication, chromatid separation, chromosome condensation, telophase II d. Tetrad formation, metaphase II, anaphase II, telophase II e. Prophase II, metaphase II, chromatid separation, chromosome decondensation

prophase ||, metaphase ||, chromatid separation, chromosome decondensation

Organize these steps in the order in which they would occur during cell division. a. Prometaphase, interphase, prophase, metaphase, anaphase, telophase b. Prophase, prometaphase, metaphase, anaphase, telophase c. Interphase, prophase, prometaphase, anaphase, metaphase, telophase d. Anaphase, interphase, metaphase, prometaphase, prophase, telophase e. Interphase, prometaphase, prophase, metaphase, anaphase, telophase

prophase, prometaphase, metaphase, anaphase, telophase

Chromosome de-condensation occurs during this step. a. Prophase b. Metaphase c. Prometaphase d. Telophase e. Anaphase

telophase

Which of the following structures is unique to meiosis? a. Tetrads b. Spindle microtubules c. Spindle poles d. Centrosomes e. Kinetochores

tetrads

Replication precedes which of the following types of cell division? I. Mitosis II. Meiosis I III. Meiosis II a. II and III b. I and III c. I, II and III d. I e. I and II

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Chromatids can be found in which of the following types of cell division? I. Mitosis II. Meiosis I III. Meiosis II a. I and II b. I and III c. II and III d. I, II and III e. I

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Which of the following events occur during prophase II? I. Kinetochore proteins assemble on the outer chromatids of each chromosome. II. Chromosome condensation III. Spindle apparatus assembly a. I and II b. I, II and III c. I d. I and III e. II and III

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Which of the following is/are consequences of meiotic recombination? I. Increased genetic diversity II. Exchange of parts of homologous chromosomes III. Stabilization of chromosomes at the metaphase plate a. I b. II and III c. I, II and III d. I and III e. I and II

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Sister chromatids segregate to opposite poles during which of the following types of cell division? I. Mitosis II. Meiosis I III. Meiosis II a. I, II and III b. I and III c. I and II b. II and III e. I

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Which of the following events occur during prophase? I. Centrosome duplication II. Centrosome movement to the spindle poles III. Centrosome organization of the spindle apparatus a. I b. I, II and III c. II and III d. I and II e. I and III

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