Biology (Raven), 9th Edition

Chapter 11: Sexual Reproduction and Meiosis

Post-Test

1
Crossing-over
A)is a way to recombine the genetic material during meiosis.
B)causes mutations.
C)only occurs during mitosis.
D)occurs at the kinetochores.
E)decreases genetic variation in the resulting gametes.
2
During crossing-over,
A)recombination occurs between the genes on the sister chromatids of homologous pairs.
B)sister chromatids exchange genetic material.
C)both non-sister and sister chromatids exchange genetic material.
D)chromosomes move.
E)large-scale genetic mutations occur along the DNA strand creating genetic variation.
3
One duplication of chromosomes followed by two subsequent reduction divisions occurs
A)only in meiosis.
B)only in mitosis.
C)in both meiosis and mitosis.
D)during genetic recombination
E)during prophase II of meiosis.
4
Tetrads (four chromatids) are seen
A)during meiosis I.
B)during meiosis II.
C)during both meiosis and mitosis.
D)in daughter cells.
E)in both meiosis I and meiosis II.
5
During meiosis II,
A)tetrads separate.
B)homologous chromosomes separate.
C)chromatids separate.
D)2n daughter cells result.
E)the synaptonemal complex forms.
6
Why do homologous chromosomes pair in prophase I and not in prophase II?
A)Pairing of chromosomes requires precision and it would take too much metabolic energy to pair them twice.
B)The kinetochores have been used up after separating the sister chromatids during meiosis I.
C)The cells are haploid during prophase II and therefore can't pair.
D)Meiosis I is more like mitosis than meiosis II is, and so the chromosomes pair up similarly in meiosis I and mitosis.
E)The spindle apparatus has broken down by meiosis II.
7
An error in meiosis that results in an abnormal number of chromosomes in the final haploid cell
A)can result from the failure of chromosomes to move to opposite poles during meiosis I.
B)can result from the failure of chromosomes to move to opposite poles during meiosis II.
C)is a condition called aneuploidy.
D)can result from nondisjunction.
E)All of the above are true.
8
If cyclin B levels did NOT drop between meiosis I and II, one probable outcome is?
A)DNA replication is likely to occur.
B)The cell would die.
C)DNA replication would cease.
D)Meiosis II would not occur.
E)Two mitotic divisions would immediately result upon the completion of meiosis.
9
In plants, the direct result of meiosis is the production of gametes
A)True
B)False
10
During which phase of meiosis does crossing over occur?
A)Prophase I
B)Metaphase I
C)Prophase II
D)Metaphase II
E)Crossing over occurs throughout meiosis I
11
Which of the following statements is true?
A)Independent assortment in mitosis creates new genotypes (genetic characteristics).
B)Pairing up of chromosomes during meiosis II creates new arrangements of genes within a single chromosome.
C)Meiosis directly produces gametes.
D)A zygote is created through meiosis.
E)Meiosis involves two nuclear divisions without having DNA replication occurring between meiosis I and II.
12
A single diploid cell is divided into two haploid cells during
A)independent assortment
B)crossing over.
C)meiosis only.
D)mitosis only.
E)both meiosis and mitosis.
13
Daughter nuclei form from each parent cell during
A)telophase I and telophase II.
B)only telophase I.
C)only telophase II.
D)neither telophase I nor telophase II.
E)cytokinesis.
14
Tetrads form during
A)metaphase I and metaphase II.
B)metaphase I only.
C)metaphase II only.
D)prophase I.
E)prophase II.
15
In which stage are duplicated chromosomes singly lined up during meiosis?
A)metaphase I and metaphase II
B)only metaphase I
C)only metaphase II
D)only prophase I
E)only prophase II
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