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Prophase Fig. 12-6a Prometaphase G 2 of Interphase
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Fig. 12-6b Prometaphase Prophase G 2 of Interphase Nonkinetochore microtubules Fragments of nuclear envelope Aster Centromere Early mitotic spindle Chromatin (duplicated) Centrosomes (with centriole pairs) Nucleolus Nuclear envelope Plasma membrane Chromosome, consisting of two sister chromatids Kinetochore Kinetochore microtubule
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Fig. 12-6c Metaphase Anaphase Telophase and Cytokinesis
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Fig. 12-6d Metaphase Anaphase Telophase and Cytokinesis Cleavage furrow Nucleolus forming Metaphase plate Centrosome at one spindle pole Spindle Daughter chromosomes Nuclear envelope forming
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Fig. 12-2 100 µm 200 µm 20 µm (a) Reproduction (b) Growth and development (c) Tissue renewal
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(a) Hydra (b) Parent Bud 0.5 mm Redwoods Simple eukaryotes and some plants can reproduce asexually.
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Chapter 13 Meiosis and Sexual Reproduction
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Key Maternal set of chromosomes ( n = 3) Paternal set of chromosomes ( n = 3) 2 n = 6 Centromere Two sister chromatids of one replicated chromosome Two nonsister chromatids in a homologous pair Pair of homologous chromosomes (one from each set) In plants and animals, most cells in the adult body have two copies of each chromosome, one from each parent. The cells are diploid.
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Pair of homologous replicated chromosomes Centromere Sister chromatids Metaphase chromosome 5 µm Karyotype of human somatic cell. male or female?
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Key Haploid ( n ) Diploid (2 n ) Haploid gametes ( n = 23 ) Egg ( n ) Sperm ( n ) MEIOSIS FERTILIZATION Ovary Testis Diploid zygote (2 n = 46) Mitosis and development Multicellular diploid adults (2 n = 46) Sexual reproduction requires meiosis and fertilization.
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