| Concepts | Questions | Media Resources |
| 10.1 Halving the Chromosome Number
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- Due to meiosis, reproductive cells contain half the total number of chromosomes.
- Meiosis requires two cell divisions and results in four daughter cells.
| - Cells with a single copy of each chromosome are called _______________, while those with two copies of each chromosome are called ______________.
Answer - The majority of cells in the bodies of animals are ______________ in terms of chromosome number, while gametes are _______________.
Answer - Describe homologous chromosomes.
Answer - What is synapsis?
Answer - In Meiosis I, ______________ move into separate cells and in Meiosis II, _____________ move into separate cells.
- sister chromatids; paternal chromosomes
- maternal chromosomes; homologous chromosomes
- homologous chromosomes; sister chromatids
- maternal chromosomes; paternal chromosomes
- sister chromotids; homologous chromosomes
Answer
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Essential Study Partner
Summaries of major points:- Sexual reproduction
- Homologous pairs of chromosomes
- Overview of meiosis
Animations
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Animation Quizzes
Explorations
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| 10.2 Genetic Recombination
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- The process of meiosis ensures that the daughter cells will not have the same number and kinds of chromosomes as the parental cell.
- The shuffling of genes due to meiosis and fertilization assists the reproductive process.
| - What is genetic recombination and in what two ways does this occur during meiosis?
Answer- The process by which non-sister chromatids of a homologous pair exchange sections (and thus genes) is called what?
Answer - At the end of crossing-over, are sister chromatids still identical to each other and why or why not?
Answer - How does independent assortment lead to genetic recombination?
Answer - Under what conditions is sexual reproduction an advantage over asexual reproduction and why?
Answer
| Essential Study Partner
Summaries of major points:- Genetic recombination
- Crossing over introduces variation
- Independent assortment of homologous chromosomes
- Fertilization
Animations
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Lab exercises
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| 10.3 The Phases of Meiosis
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- Meiosis I and meiosis II each have four phases each.
- During meiosis I the chromosomes are no longer duplicated.
| - What are the end products of Meiosis I?
Answer - What are the end products of Meiosis II?
Answer
| Essential Study Partner
Summaries of major points:- Number of phases
- Prophase I
- Metaphase I
- Anaphase I
- Telophase I
- Interkinesis
- Meiosis II
Labeling Exercises
Animations
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| 10.4 Comparison of Meiosis and Mitosis
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- Meiosis differs from mitosis both in occurrence and in process.
| - How many daughter cells are produced during Mitosis and Meiosis, what is the ploidy number of each, and how do they compare to the parental cell?
Answer - What types of animal cells undergo Meiosis and Mitosis and for what reasons?
Answer
| Essential Study Partner
Summaries of major points:- How meiosis I differs from mitosis
- How meiosis II differs from mitosis
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| 10.5 The Human Life Cycle
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- The human life cycle includes both mitosis and meiosis.
- In humans, and many other animals, meiosis is a part of the production of sperm in males and eggs in females.
- When the sperm fertilizes the egg, the full number of chromosomes is restored to offspring.
| - In humans, what type of cells is created by spermatogenesis and what type by oogenesis?
Answer - How many chromosomes are found in each human cell?
Answer - How many egg cells are produced during each meiotic event in human females and why?
Answer
| Summaries of major points:- Life cycle has both meiosis and mitosis
- Spermatogenesis and oogenesis in humans
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Meiosis (2688.0K)