chapt11_lecture - Sexual Reproduction and Meiosis Chapter...

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Sexual Reproduction and Meiosis Chapter 11
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2 Overview of Meiosis Meiosis is a form of cell division that leads to the production of gametes . gametes : egg cells and sperm cells -contain half the number of chromosomes of an adult body cell Adult body cells ( somatic cells ) are diploid , containing 2 sets of chromosomes. Gametes are haploid , containing only 1 set of chromosomes.
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3 Overview of Meiosis Sexual reproduction includes the fusion of gametes ( fertilization ) to produce a diploid zygote . Life cycles of sexually reproducing organisms involve the alternation of haploid and diploid stages. Some life cycles include longer diploid phases, some include longer haploid phases.
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Features of Meiosis Meiosis includes two rounds of division – meiosis I and meiosis II . During meiosis I, homologous chromosomes ( homologues ) become closely associated with each other. This is synapsis . Proteins between the homologues hold
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This note was uploaded on 08/06/2010 for the course BIO 1510 taught by Professor Rodriguez during the Spring '08 term at Wayne State University.

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chapt11_lecture - Sexual Reproduction and Meiosis Chapter...

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