PPT-MEIOSIS

Dr Debbie Payne Ruth H Liddell Shirley K Scarbrough Alabama State University Math Science Partnership Summer 2013 CROSSING OVER When does it occur Why is it important Meiosis in Lily. EQ:. What is the importance of meiosis in providing genetic variation?. . SPECIALIZED CELLS. You have many specialized cells in your body that can be divided into two groups. . 1. . . SOMATIC. = body cells; make up most of your . (making sperm and eggs…). We. ’. re NOT talking about making babies, we. ’. re talking about making the CELLS that make babies – eggs and sperm! . Eggs and sperm are GAMETES.. Gamete = sex cells (. 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). IB Biology. Cell Cycle. Mitosis. Prophase . Metaphase. Anaphase. Telophase. Lung Cancer. Meiosis. Mitosis vs. Meiosis. Crossover . Karyotype. Trisomy. Monosomy. Chapter 13. Vocabulary. heredity. variation. gene. gamete. somatic cell. asexual . vs. sexual reproduction. autosomes. sex chromosomes. allele. dominant . vs. recessive. diploid . vs. haploid. parental generation. CfE Advanced Higher Biology. Unit 2: Organisms and Evolution. 2bii. – Meiosis forms variable gametes. Terminology (4). Sexual life cycle of animals (1). Meiosis – an overview (1). Meiosis I (4). Sexual Reproduction. SEXUAL REPRODUCTION. Sex cells formed by meiosis. Requires 2 parents. Offspring not identical. The process that results in the formation of . gametes. Sex cells, egg or sperm, which have . Chapter 8. Asexual vs. Sexual reproduction. Asexual reproduction – new organisms/cells are genetically identical to parent cells/organisms . Sexual reproduction – offspring have a combination of genes from both parents. . Mistakes in Meiosis. Many genetic disorders can be traced back to . errors in formation of the gametes . in meiosis. Could occur as the result of:. Mistakes in . separation of the chromosomes . during division. Image from about.com . meiosis_metaphase_1.jpg. . Mutations. (changes in an organism’s DNA) are the . original. . source of . all. genetic variation. Mutations create different versions of genes called . Mrs. Stewart. Biology I . Stewarts Creek High School. Objectives:. Differentiate between the process of mitosis and meiosis. Demonstrate the movement of chromosomes throughout meiosis. Analyze how meiosis leads to genetic variation. Meiosis Terms . to Know:. Meiosis. : Cell division that produces gametes (sex cells/sperm & egg). These cells are used for sexual reproduction. They have . half . the number of chromosomes as the parent cell.. Suppose that the . anole lizard has . fifty-two. chromosomes in the nucleus of its body or somatic cells. How many chromosomes will be in the . unfertilized. . egg. of . an anole lizard. ?. 1. 13. 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..