PPT-Gamete Formation MEIOSIS

Click here to see fertilization and chromosome numbers Meiosis Process of nuclear division t hat reduces the number of chromosomes in new cells to HALF the number in the original cell. Reduction Division. Mike Clark, M.D.. Meiosis. Meiosis is nicknamed reduction division. It is a process where a cell divides (division) but reduces the genetic material to ½ (reduction) . This type of cell division occurs in the gametes (sex cells). Obectives. Describe the result of meiotic division in terms of sexual reproduction. Discuss the structure of homologous chromosomes. Describe chromosomes in terms of ploidy. Distinguish between sexual and asexual reproduction. Gametes. ________ are sex cells. . Haploid. The daughter cells produced at the end of meiosis II are considered- diploid or haploid?. Genetically DIFFERENT!. What is the genetic relationship of daughter cells to each other in meiosis?. Gamete vs. Zygote. What is a Gamete?. Egg & Sperm . What is a Zygote?. When two gametes come together (fertilization). Why your body can . not. use mitosis to make sperm or eggs?. A typical cell in your body has 46 chromosomes (23 pairs of homologous chromosomes). Suppose that human sperm and eggs were produced by mitosis. How many chromosomes would each sperm or egg have?. Before we start genetics, let's review the process of what makes us all look different compared to our siblings, family, and classmates!. Sexual Reproduction. Sexual reproduction creates genetic variability. That is why we all look different and you look different from your siblings! . Cells Alive- . http://. cellsalive.com/meiosis.htm. . Meiosis animation. http://. www.youtube.com/watch?v=kVMb4Js99tA. . Meiosis Practice Test. Answer the following questions on the back of your review sheet.. Meiosis Gamete Formation Why are siblings sometimes so much alike and other times so different? How is the information from parents distributed to offspring? 1 Version January 2018 Teacher notes We use these symbols Embryo Sac Development. Cells of Carpel Sac are 2n. Cell in Ovule divide by Meiosis and it becomes the embryo sac or Megaspore. Meiosis. 4 Haploid Cells are made. 3 die and 1 survive. Cell Division. Mitosis. Alteration of Chromosome Structure. Breakage of a chromosome can lead to four types of changes in chromosome structure:. Deletion . removes a chromosomal segment. Duplication . repeats a segment. Inversion . If YOU are human, then YOUR cells have 46 chromosomes and your parents’ cells each have 46 chromosomes. Agreed? If you get DNA from both your parents then why wouldn’t you end up with 92 chromosomes? . MEIOSIS PART 3: . IMPORTANCE OF MEIOSIS, ABNORMAL MEIOSIS, MITOSIS VS MEIOSIS. For each section please read the . exam guidelines. first before going on to the content.. Learn all the content in this presentation. Essential Idea: . Meiosis produces genetically-varied, haploid cells needed for sexual reproduction. 3.3.1 One diploid nucleus divides by meiosis to produce four haploid nuclei. Meiosis. . is a process that divides . 1. 2. 3. 4. Bellwork. : Identify which “PHASE” the cells are going through and DRAW that cell. . Prepare your Journals for Cornell Notes. Page . 47. Title: Meiosis. Essential Question:. . What is meiosis and how is it different than mitosis?. 1. 2. Sexual Reproduction. . Involves the production of sex cells (gametes) and the fusion of their nuclei (fertilization), producing a fertilized egg cell (zygote). Gametes. Fertilization. 3.