Biology, Eighth Edition (Raven)

Chapter 11: Sexual Reproduction and Meiosis

Post Test

Which of the following is NOT a requirement for cells to undergo meiotic division? (p. 207)
A)The organism must have pairs of each chromosome
B)The cell must be a eukaryote
C)The organism must be an animal
D)Gametes are required at some stage of the organism's life cycle
E)All of the statements are true requirements for meiosis to occur
Why do homologous chromosomes pair in prophase I and not in prophase II? (p. 208)
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)Two of the above are correct
An error in meiosis that results in an abnormal number of chromosomes in the final haploid cell (p.214)
A)occurs only if separation of chromosomal material occurs in meiosis I.
B)occurs only if separation of chromosomal material occurs in meiosis II.
C)is a condition called aneuploidy.
D)Two of the above are true
E)All of the above are true
If cyclin B levels dropped dramatically after meiosis I, what outcome can be said with the most certainty? (p. 216)
A)The DNA content of the cells would be half that of the meiotic mother cell during prophase I.
B)The cell would die.
C)The cells produced at the completion of meiosis would have less DNA than normal.
D)Meiosis II would be even more similar to mitosis.
E)Two mitotic divisions would immediately result upon the completion of meiosis.
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