Lecture 14 Class: Meiosis While you wait for class to begin: Fill in the following diagram with 2n = 4 chromosomes: Starter: Mitosis, in contrast to Meiosis: A. Produces gametes B. Requires a previous S phase C. Is seen in gut epithelial cells D. Has crossing over before anaphase E. Results in haploid cells Which of the following occurs during Meiosis 1? A. Crossing over B. DNA is replicated C. Sister chromatids are separated D. Maternal chromosomes line up independently from their homologues Lecture 14 Page 1 Stage Cells in G1 How many Chromosomes look chromosomes? like: How many sister chromatids? 46 0 Ploidy? 2n or n 2n In G2 Daughter cells after mitosis Daughter cells after meiosis 1 Daughter cells after meiosis 2 Which of the following is TRUE at the conclusion of meiosis I? A. Homologous chromosomes are separated B. Daughter cells are diploid Which occurs in meiosis? Which is related to independent assortment? A. Duplication of chromosomes B. Separation of sister chromatids C. Separation of homologous chromosomes In meiosis, tetrads of chromosomes are aligned at the equator of the spindle and their alignment determines independent assortment during: a. Metaphase 1 b. Metaphase 2 Lecture 14 Page 2 http://www.sumanasinc.com/webcontent/animations/content/mistakesmeiosis/mistakesmeiosis.html Anuploidy Monosomy Trisomy Lecture 14 Page 3