PPT-Chapter 13: Meiosis and

Sexual Life Cycles modes of reproduction diploidhaploid and meiosis meiosis I and meiosis II phases key differences between mitosis and meiosis variation in position of meiosis in life cycles why sex. 10. Meiosis. You Must Know. The importance of homologues chromosomes to meiosis.. How the chromosome number is reduced from diploid to haploid in meiosis.. Three events that occur in meiosis but not mitosis.. MEIOSIS. Parents can produce many types of offspring . Families will have resemblances, but no two are exactly alike. Every cell has a nucleus.     Every nucleus has chromosomes. The number of chromosomes depends on the species. 1. Introductory Vocabulary. 2. Heredity. .  . t. he . transmission of traits from one generation to the next . Variation. .  when o. ffspring . differ somewhat from their parents and . siblings. 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! . Key Concepts:. What happens during the process of meiosis?. How is meiosis different from mitosis?. Types of . Reproduction. Section 11-4. ASEXUAL. SEXUAL. 1. One Parent. 2. Binary fission (in prokaryotes) or mitosis in (eukaryotes).. 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.. Life Cycles. Overview: Variations on a Theme. Living organisms are distinguished by their ability to reproduce their own kind. Genetics . is the scientific study of heredity and variation. Heredity . Why do. cells have to divide. ?. 2 Reasons – . . 1. To grow . . 2. Replace old/damaged/dead cells. 2 Reasons – Surface area to volume ratio is an issue. What is the most important part of the cell that has to . 6.1 Chromosomes and Meiosis. Cells can be divided into 2 major groups:. Somatic (body): most of body tissue and organs. Germ: found in reproductive organs, develop into gametes. Gametes are sex cells – ova (eggs) & spermatozoa (sperm). Meiosis is the. . type of . cell division by which . germ cells . (eggs and sperm) . are produced. . One parent cell produces . four . daughter cells. . Daughter cells have half the number of chromosomes found in the parent cell. 1. . Interphase. 2. Cell Division. 2 main parts to the cell cycle. (AKA--Mitotic Phase). C. E. L. L. C. Y. C. L. E. Parts of a Homologous Pair of Chromosomes. Centromere. Chromosome. Chromatid. Homologous . Let’s Review!. The cell cycle is when . a cell makes a copy of itself . for:. Growth, Repair, Replacement. BODY (autosomal/somatic) cells reproduce . by . mitosis. s. ome . organisms . do also, . but we will talk about that . Halving the Chromosome Number .. A. Sexual reproduction . 1. Requires gamete formation and then fusion of gametes to form . a zygote.. 2. If gametes contained same number of chromosomes as body cells, doubling would soon fill cells.. In asexual reproduction, a single individual gives rise to offspring that are identical to itself and . others [MITOSIS]. Bacteria reproduce asexually. Most plants and some simple animals can reproduce both asexually and .