1. by Ranny Copenhaver MEIOSIS Bio SOL Addressed: 5.a,b,c,g

2. Meiosis I DNA replication takes place. A parent cell produces two daughter cells with one member of each original pair of homologous chromosomes. Bio SOL Addressed: 5.a,b,c,g

4. Meiosis II There is no DNA replication. The chromatids of each chromosome separate and each daughter cell divides. At the end of Meiosis, there are four daughter cells from each parent cell. Each daughter cell has half the number of chromosomes of the parent. Bio SOL Addressed: 5.a,b,c,g

6. Spermatogenesis Spermatogenesis refers to the creation, or genesis, of sperm cells, which occurs in the male gonads or testes. Spermatogenesis refers to the creation, or genesis, of sperm cells, which occurs in the male gonads or testes.sperm Vast numbers of sperm are produced. Vast numbers of sperm are produced. Sperm cells develop initially from germ stem cells known as spermatogonia. As these differentiate they become spermatocytes, spermatids (after meiosis) and then finally the fully mature spermatozoa. Sperm cells develop initially from germ stem cells known as spermatogonia. As these differentiate they become spermatocytes, spermatids (after meiosis) and then finally the fully mature spermatozoa. spermatidsmeiosis spermatidsmeiosis Bio SOL Addressed: 5.a,b,c,g

8. Oogenesis The female counterpart to spermatogenesis is oogenesis. The female counterpart to spermatogenesis is oogenesis. Oogenesis is the formation of an egg and its preparation for fertilization and development Oogenesis is the formation of an egg and its preparation for fertilization and developmenteggfertilizationeggfertilization Bio SOL Addressed: 5.a,b,c,g

10. Sources University of Wisconsin Madison, (June 19, 2006). Meiosis I. Retrieved February 10, 2009, from University of Wisconsin Madison Web site: http://botit.botany.wisc.edu/images/130/Meiosis/Lilium_microsporogenesis/Meiosi s_I.html University of Wisconsin Madison, (June 19, 2006). Meiosis I. Retrieved February 10, 2009, from University of Wisconsin Madison Web site: http://botit.botany.wisc.edu/images/130/Meiosis/Lilium_microsporogenesis/Meiosi s_I.html University of Wisconsin Madison, (June 19, 2006). Meiosis II. Retrieved February 10, 2009, from University of Wisconsin Madison Web site: http://botit.botany.wisc.edu/images/130/Meiosis/Lilium_microsporogenesis/Meiosi s_II.html University of Wisconsin Madison, (June 19, 2006). Meiosis II. Retrieved February 10, 2009, from University of Wisconsin Madison Web site: http://botit.botany.wisc.edu/images/130/Meiosis/Lilium_microsporogenesis/Meiosi s_II.html National Health Museum, (1999). Meiosis. Retrieved February 10, 2009 from National Health Museum Web site: http://www.accessexcellence.org/AB/GG/meiosis.html National Health Museum, (1999). Meiosis. Retrieved February 10, 2009 from National Health Museum Web site: http://www.accessexcellence.org/AB/GG/meiosis.html (2009). Spermatogenesis. Retrieved February 10, 2009, from Bio-Medicine Web site: http://www.bio-medicine.org/biology-definition/Spermatogenesis/ (2009). Spermatogenesis. Retrieved February 10, 2009, from Bio-Medicine Web site: http://www.bio-medicine.org/biology-definition/Spermatogenesis/ (2009). Oogenesis. Retrieved February 10, 2009, from Bio-Medicine Web site: http://www.bio-medicine.org/biology-dictionary/Oogenesis/ (2009). Oogenesis. Retrieved February 10, 2009, from Bio-Medicine Web site: http://www.bio-medicine.org/biology-dictionary/Oogenesis/ Kimball, John W. (December 17, 2008). Sexual reproduction in humans. Retrieved February 10, 2009, from Kimbal's Biology Pages Web site: http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/S/Sexual_Reproduction.ht ml Kimball, John W. (December 17, 2008). Sexual reproduction in humans. Retrieved February 10, 2009, from Kimbal's Biology Pages Web site: http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/S/Sexual_Reproduction.ht ml Bio SOL Addressed: 5.a,b,c,g