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BGSU BIOL 2050 - Meiosis

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BIOM 121 1nd Edition Lecture 19 Outline of Last Lecture I. Cancer Outline of Current Lecture II. Meiosisa. Make upb. Life Cyclec. StagesCurrent LectureMeiosisMake UpExample: 2n=6- Maternal set of chromosomes: n=3- Paternal set of chromosomes: n=3- Homologous chromosomes: one of each set of chromosomeso Sister chromatids of one duplicated chromosome Centromeres: attach sister chromatidsLife Cycle- Fertilized eggo Diploid zygote (2n)- Ovaries= egg- Testes= spermStages- G1: growth- S: homologous chromosomeso Four chromatids- Meiosis I: homologous chromosomes separateo Prophase I: recombination occurs at chiasmatao Metaphase I: chromosomes line up by homologous pairso Anaphase I: homologous chromosomes separateo Telophase I: two haploid cells form that contain pairs of sister chromatidsThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- Meiosis II: chromatids separate and four haploid cells formo Prophase IIo Metaphase IIo Anaphase IIo Telophase II Results in four haploid gamete cells- Meiosis can result in many different chromosomal combinations of gamete


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BGSU BIOL 2050 - Meiosis

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