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230_021411 (1) - Meiosis Chapter 13 Outline Meiosis and...

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Meiosis Chapter 13 February 14, 2010
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Outline Meiosis and Sexual Life Cycles Perspective Heredity Sexual reproduction Meiosis
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Transmission of traits via gametes (sperm and egg) Heredity Transmission of traits from one generation to the next Hereditary units are called genes Genes program specific traits that emerge during embryogenesis
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Asexual reproduction genetically identical progeny (clones) Sexual reproduction unique combinations of genes
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DNA Histone proteins Sister chromatids Condensation of chromosomes during mitosis and meiosis
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Homologous Chromosomes
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Preparing cells for a karyotype 3. The cells are processed to isolate and photograph their chromosomes 1. White blood cells are treated with a growth factor to stimulate mitosis, and grown for several days 2. A drug is added to arrest mitosis at metaphase
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centromere Sister chromatids Human Karyotype: Visualization of Chromosomes in a Cell at Metaphase Which sex is this individual?
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