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Chapter 13: Meiosis and Sexual Life Cycles
 
Pre-Test
 

Pre-Test


1 .       Asexual reproduction _____. (Concept 13.1E-Book) [Hint]

 is limited to plants
 leads to a loss of genetic material
 produces offspring genetically identical to the parent
 requires both meiosis and mitosis
 is limited to single-cell organisms
2 .       A human somatic cell contains _____. (Concept 13.1E-Book) [Hint]

 22 autosomes and 1 sex chromosome
 21 autosomes and 2 sex chromosomes
 45 autosomes and 1 sex chromosome
 44 autosomes and 2 sex chromosomes
 n chromosomes
3 .       For what purpose might a karyotype be prepared? (Concept 13.2E-Book) [Hint]

 for prenatal screening, to determine if a fetus has the correct number of chromosomes
 to determine whether a fetus is male or female
 to detect the possible presence of chromosomal abnormalities such as deletions, inversions, or translocations
 The first and second answers are correct.
 The first three answers are correct.
4 .       The diploid stage of a plant that follows the life cycle called alternation of generations is the _____. (Concept 13.2E-Book) [Hint]

 chiasmata
 gametophyte
 spore
 karyotype
 sporophyte
5 .       One difference between meiosis I and meiosis II is that _____. (Concept 13.3E-Book) [Hint]

 only meiosis I includes prophase, metaphase, anaphase, and telophase
 crossing over occurs in meiosis I, but not in meiosis II
 the two daughter cells produced at the end of meiosis I are different from each other, but the two cells produced in meiosis II are identical
 only meiosis I occurs in males, but both meiosis I and meiosis II occur in females
 chromosomes line up at the metaphase plate during meiosis I, but remain dispersed throughout the cell during meiosis II
6 .       Mitosis results in the formation of _____; meiosis results in the formation of _____. (Concept 13.3E-Book) [Hint]

 four diploid cells ... four haploid cells
 two diploid cells ... two haploid cells
 two diploid cells ... four haploid cells
 two diploid cells ... two diploid cells
 four haploid cells ... two diploid cells
7 .       Which of the following occurs during meiosis but not during mitosis? (Concept 13.3E-Book) [Hint]

 Chromosomes align at the metaphase plate.
 Chromosomes condense.
 Chromosomes migrate to opposite poles.
 A spindle apparatus forms.
 Synapsis occurs.
8 .       Crossing over is _____. (Concept 13.3E-Book) [Hint]

 the movement of genetic material from one chromosome to a nonhomologous chromosome
 also referred to as the "independent assortment of chromosomes"
 a direct consequence of the separation of sister chromatids
 the exchange of homologous portions of nonsister chromatids
 making an RNA copy of a DNA strand
9 .       Genetic variation occurs when chromosomes are shuffled in _____ and fertilization. (Concept 13.4E-Book) [Hint]

 mitosis
 genetic drift
 natural selection
 mutation
 meiosis
10 .       Heritable variation is required for _____. (Concept 13.4E-Book) [Hint]

 meiosis
 mitosis
 evolution
 asexual reproduction
 the production of a clone





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