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Bio 101 Day 20 - Lecture Outlines with Questions and Key...

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Lecture Outlines with Questions and Key Terms (plus key figures) are available MSLC Mon-Fri, 10 AM – 4 PM Colored Pens or Pencils will be useful in lecture this week Human Karyotype 22 pairs of autosomes 1 pair of sex chromosomes Mitosis:: Prophase --One cell with duplicated chromosomes Anaphase --Sister chromatids move to opposite poles Daughter Cells --Two cells with unduplicated chromosomes Sexual Life Cycle Fusion of Gametes --Two haploid gametes fuse Diploid Zygote Meiosis:: Prophase I Anaphase I Prophase II Anaphase II Haploid Cells Haploid Cells
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--Each contain only one member of each homologous chromosome pair --Four n cells with unduplicated chromosomes Interphase Meiosis I (Mid-Prophase I) Late Prophase I Interphase preceding meiosis; DNA replicates Homologous chromosomes synapse, forming tetrads; nuclear envelope breaks down Stages of Meiosis Meiosis I Prophase I Metaphase I Anaphase I Telophase I Meiosis II Prophase II Metaphase II Anaphase II Telophase II Stages of Prophase I 1) Leptotene Stage 2) Zygotene Stage 3) Pachytene Stage
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