Cell division

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Cell biology

Cell cycle

Cyclin

Campbell's Biology, 9e (Reece et al.) Chapter 12 The Cell Cycle In this chapter, 24 questions are new, and 12 have been altered to incorporate new material from the textbook. As in the other chapters, any questions that depend on figures or introductory scenarios have been placed at the end of the chapter rather than in concept sequence. Multiple-Choice Questions 1) The centromere is a region in which A) chromatids remain attached to one another until anaphase. B) metaphase chromosomes become aligned at the metaphase plate. C) chromosomes are grouped during telophase. D) the nucleus is located prior to mitosis. E) new spindle microtubules form at either end. Answer: A Topic: Concept 12.1 Skill: Knowledge/Comprehension

AP Bio_Meiosis

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Homologous chromosome

Cohesin

Cell division

Concept 13.3: Meiosis reduces the number of chromosome sets from diploid to haploid * Like mitosis, meiosis is preceded by the replication of chromosomes * Meiosis takes place in two consecutive cell divisions, called meiosis I and meiosis II * The two cell divisions result in four daughter cells, rather than the two daughter cells in mitosis * Each daughter cell has only half as many chromosomes as the parent cell The Stages of Meiosis * Chromosomes duplicate before meiosis * The resulting sister chromatids are closely associated along their lengths * This is called sister chromatid cohesion * The chromatids are sorted into four haploid daughter cells * Division in meiosis I occurs in four phases: Prophase I

Ch 13 Study Guide

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Homologous chromosome

Chromatid

Cell division

Copyright ? 2011 Pearson Education, Inc. -1- Name__________________________Period___________ Chapter 13: Meiosis and Sexual Life Cycles Concept 13.1 Offspring acquire genes from parents by inheriting chromosomes 1. Let?s begin with a review of several terms that you may already know. Define: gene: A discrete unit of hereditary information consisting of a specific nucleotide sequence in DNA (or RNA, in some viruses) locus: A specific place along the length of a chromosome where a given gene is located gamete: A haploid reproductive cell, such as an egg or sperm. Gametes unite during sexual reproduction to produce a diploid zygote. male gamete: Sperm female gamete: Eggs

Ch 12 Study Guide

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Copyright ? 2011 Pearson Education, Inc. - 1 - Name_______________________Period___________ Chapter 12: The Cell Cycle Overview: 1. What are the three key roles of cell division? State each role, and give an example. Key Role Example Reproduction An amoeba, a single-celled eukaryote, divides into two cells. Each new cell will be an individual organism. Growth and development A sand dollar embryo forms two cells shortly after the fertilized egg is divided. Tissue removal Dividing bone marrow cells will give rise to new blood cells. 2. What is meant by the cell cycle? The cell cycle is the life of a cell from the time it is first formed from a dividing parent cell until its own division into two daughter cells.

AP Biology Campbell 8th edition Chapter 12 Study Guide

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Gene

Health

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The Cell Cycle

STUDY GUIDE: CH. 12 THE CELL CYCLE THE KEY ROLES OF CELL DIVISION 1. Explain how cell division functions in reproduction, growth, and repair. -Single-celled and other organisms reproduce asexually by cell division -Asexual spores, binary fissiion in bact., growth, breakage, and estab. Of vines -Growth may increase the sizes or numbers of cells -Wounding releases growth factors that stimulate mitosis 2. Describe the structural organization of the genome. -Organisms may have hundreds to tens of thousands of genes -Genes, controlling sequences, spacers, and junk are strung on chromosomes -Chromosome numbers -Bacteria may have one or a few circular or linear chromosomes -Eukaryotes may have one to >1000 linear chromosomes

How do cells divide?

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