November 30, 2011 Biology 311C Lecture 39 • Final exam: 40 multiple choice questions, 2.5 points each. 50 points free response. • Concept check questions at the end of each section. Self-quiz questions. Do Mastering Biology. • Gametes are necessary to make babies because we reproduce sexually meaning we mix our genetic information to create an offspring. • Gametes have half as many chromosomes as our somatic cells. • Like mitosis, meiosis is preceded by the replicated of chromosomes. • In interphase, the homologous pair is separated and create a diploid cell. • In meiosis I, we get 2 haploid cells with replicated chromosomes after the homologous chromosomes separate. • In meiosis II, the sister chromatids separate and 4 haploid cells with unreplicated chromosomes are created. • Prophase I: In synapsis, homologous chromosomes loosely pair up, aligned gene by gene forms a tetrad. • There are 6 chromosomes
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