PPT-YARN MODEL OF DNA/GENES/CHROMOSOMES

The yarn represents DNA DNA is a tiny long thin chemical How does the yarn resemble DNA If we looked closely at the DNA inside each of your cells it would look like a twisted ladder . Camp Sunshine. July 22, 2013. Diamond . Blackfan. Anemia . Foundation. Diamond . Blackfan. Anemia Canada. THE FUNDAMENTALS. Humans have 46 chromosomes in each cell: 23 pairs. Sperm and egg cells have 23 chromosomes, 1 of each pair.. Chromosome theory of inheritance. Genes located on chromosomes = gene locus. Thomas Hunt Morgan, Columbia Univ. “Fly room”. Drosophila. 100s of offspring. 2n = 8. 3 . prs. autosomes. X and Y sex chromosomes. (Game from Univ. Utah). Siguna. Mueller. PhD student in BMS, Univ. Wyoming. What is DNA?. Each cell needs instructions for its role in the body. What do these instructions look like?. The instructions come in the form of a molecule called DNA.. Another way to have a [healthy] baby!. What are genes?. Genes are made up of DNA. Genes carry in the information for cells to make a specific part of what makes you, you!. There are genes for making your skin, your hair, your heart, etc…. . Humans have approximately . 20,000 – 30,000. genes that code for traits. . However, only have . 46 chromosomes. . Thus each chromosome must have . many genes. on them. . Often seen in . Sex-Linked Traits. The Chromosome Theory of Heredity. Mutations. Regulation of Gene Expression. Objectives. State the chromosome theory of heredity. Explain how gene linkage affects inherited traits. Describe the process of crossing-over and explain how it increases genetic variety. GENES. DNA. DNA. :  the chemical inside the nucleus of a cell that carries the genetic instructions for making living organisms. . The material inside the nucleus of cells that carries genetic information.. The Chromosomal Basis . of. Inheritance. Chromosome Theory of Inheritance. 1860: Mendel. 1875: stages of mitosis. 1890: stages of meiosis. 1902: Walter Sutton & Theodor . Boveri. noted parallels between Mendel’s “factors” & what chromosomes do in mitosis & meiosis. Discuss backpacking project. Create genetics table of contents. Discuss essential question. Begin DNA and base pairing. Warm-Up: Make predictions in . yout. notebook. What does DNA stand for?. What is DNA made up of?. Human Genes and Chromosomes. Chromosomes 21 and 22 are the smallest human autosomes. Chromosome 22 has about 43 million DNA base pairs. Chromosome 21 has about 32 million base pairs. . Chromosome 22 has about 545 different genes. Genetic disorders tat occur on chromosome 22 are leukemia and neurofibromatosis (a tumor causing disease). There is also a long stretch of repeating DNA that does not code for proteins. . Human Inheritance. Disorders caused by individual genes - dominant. Individuals with the disorder only need 1 allele to have the disorder. Huntington’s Disease. Caused by a repeat of the sequence CAG . 3.2.1. . Bacterial Chromosomes (prokaryotes). Most only have 1 chromosome.. Which means, it only contains a single copy of each gene (except during cell division when chromosomes are replicated).. Has circular DNA that contains all genes needed for basic life processes of the cell.. Genetics – study of heredity. Gene – determinant of heredity. Chapter is outline of basic principles of genetics. www.sardi.sa.gov.au/. livestock. /meat_wool/breeding_. genetics. Cell Theory of Inheritance. Split . genes: Exons and introns. Chromatin structure and . states: Epigenetics. 12/21/14. 1. Classification by +/- nucleus. Prokaryotes: Organisms whose cells lack a nucleus. Bacteria and . Archaea.