PPT-Human chromosomes There are 46 chromosomes (23 homologous pairs) in each somatic cell

22 pairs of autosomes 1 pair of sex chromosomes XX Female XY Male Karyotype chromosomes are arranged according to shape and size AN EXTRA COPY OF CHROMOSOME 21 CAUSES DOWN SYNDROME This condition is called . Mitosis vs. Meiosis . Mitosis. One division. 2 diploid daughter cells. Identical to parent cell. Mitosis. Two divisions. 4. haploid daughter cells. Genetically different from. parent cell. http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter28/animation__how_meiosis_works.html. 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.. Homologous chromosomes . – identical chromosomes. . …same length, . centromere. , same staining pattern. . …exception…males sex chromosome. 1-22 . autosomes. . sex . chromsomes. Homologous chromosomes. 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). SOMATIC CELL HYBRIDISATION. INTRODUCTION. It involves the fusion of somatic cells growing . in vitro. .. First demonstrated with mouse cells by . G.Barski. (1960).. Somatic cell hybrids can be produced between two cell of same species or two cells from different species. For ex. Mouse-human hybrids.. A. The starter is broken.. B. The gas pedal of a car does not work at all.. C. The brake pedal of a car gets stuck while pushed down.. D. The brake pedal of a car does not work at all.. 2. ..  You have been asked to provide genetic counseling to a family who has a very high incidence of various types of cancer. After some discussion, you tell them that you will do some genetic testing to determine if they carry any mutations that predispose them to cancer. Mutations in which of following proteins are most commonly associated with cancers? . 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.. 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).. 2/24/16. Update Your Table of Contents!. Page 16 – Intro. To Genetics Guided Reading. Page 17 – Mendel, Somatic Cells, and Gametes. Organisms that reproduce . sexually . are made up of two different types of cells.. 1. Grab the chromosomes from the. parent cell . to fill in the other steps in mitosis, including . DNA replication. , . cell division. and the resulting two . daughter cells. . . 2. Answer the question below and move to the next slide.. Crossing over . The term crossing over was coined by Morgan.. In crossing over , exchange the chromosomal parts or segments in the non-sister chromatids of homologous chromosomes. . In another words , . 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. 2n 2n Meiosis 2. How many DNA molecules are present in a chromosome of a cell in metaphase of mitosis? How many DNA molecules are present in a chromosome of a cell at metaphase II 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 .