1.
Box 9.1, Figure 1
Is this human karyotype normal, or does it reveal the presence of an extra chromosome or the absence of a chromosome?
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2.
Figure 9.3
Label prophase, metaphase, anaphase, and telophase of meiosis I on the figure in your textbook (page 180).
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3.
Figure 9.3
Label prophase, metaphase, anaphase, and telophase of meiosis II on the figure in your book (page 181).
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4.
Figure 9.4a
This cell is undergoing meiosis I. What is happening?
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5.
Figure 9.4b
What stage of meiosis is illustrated here? Is this cell haploid or diploid?
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6.
Figure 9.4c
Is this meiosis I or II? What phase?
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7.
Figure 9.4d
What is happening in this photograph?
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8.
Figure 9.6
In step 2 of the figure in your book (page 185), label where a double crossover event is occurring. To the last line in this figure, add sketches showing the chromosome complements in additional offspring produced by selfing.
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9.
Figure 9.9
How many asexually produced offspring would be present in generation 4? How many sexually produced offspring?
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10.
Figure 9.11
Nondisjunction can also occur during meiosis II, after meiosis I has proceeded normally. Starting with a parent cell like the one shown here, make a diagram showing each step in meiosis when sister chromatids fail to disjoin at meiosis II. How many of the resulting gametes are normal? How many have an extra chromosome or lack a chromosome?
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11.
Figure 9.12
Suppose that you are an obstetrician. Based on these data, at what age would you recommend that pregnant mothers undergo procedures to check the karyotype of the embryos they carry?
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