PPT-Chapter 7: Genes and Inheritance

Family resemblance how traits are inherited Lectures by Mark Manteuffel St Louis Community College How can a single bad gene make you smell like a rotten fish 71 Family resemblance your mother and father contribute equally to your genetic makeup. This presentation . builds on session 1 exploring patterns of inheritance. Patterns of inheritance. The objectives of this presentation are to:. Understand how genes are inherited. Understand the differences between the inheritance patterns associated with Autosomal dominant, Autosomal recessive, X-linked recessive and chromosomal abnormalities. INTRODUCTION TO GENETICS. APPLIED GENETICS. Chapter 14A: INTRODUCTION TO GENETICS. Mendel. Rules and Terminology for Examination of Genetic Inheritance. Expanding the Rules and Terminology to follow two (or more) genes in a cross. Chapter 14. In the 1800s the popular inheritance theory was “blending”--offspring were a mixture of their parents. this suggests that organisms will become uniform over time (we know this isn’t true). Contents:. Introduction to sex linked inheritance.. Chromosome carries which type of genes?. Three types of traits. Characteristics of sex linkage.. Types of sex linkage.. Sex linked disorders.. Sex linked inheritance :. Overview of Genetics. Genetics – Overview. Genetics is the study of heredity and variation . Genetics is the unifying discipline in biology. Explains why organisms have certain traits . How traits are passed from parent to offspring. SBI3U. Mendel Demonstrated. :. Law of Segregation. Law of Independent Assortment. The . alleles. for a gene . segregate independently. . during meiosis. . This applies to alleles located on homologous chromosomes. 11.1 Basic Patterns of Human Inheritance. 11.2 Complex Patterns of Inheritance. EQ: What is the difference between sex linked genes and genes found on autosomal chromosomes? . Chromosomes and Phenotype. 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. Chapter 15, Section 5. Genomic Imprinting. For a few mammalian traits (2-3 dozen), the phenotype depends on which parent passed along the alleles for those traits.. Such variation in phenotype is called . 1. Chromosomal Theory of Inheritance. Theodor . Boveri. Walter Sutton. In 1902, Walter Sutton and Theodor . Boveri. developed the . Chromosome Theory of Inheritance. . . This theory basically states that Mendelian genes have a specific locus on the chromosome and that chromosomes undergo segregation and independent assortment during meiosis. . 12.1 Chromosomal Inheritance . 1. Genes are located on chromosomes; this is called the . chromosome theory of inheritance. .. 12.1 Chromosomal Inheritance. Chromosomes can be categorized as two types:. 1. A. Background. . 1. Genetics. . 1860’s—. Mendel. . proposed that discrete . inherited . factors . segregate . and assort . independently . during gamete . formation. . 2. Cytology. . nuture. ; how our environment talks to us, sometimes forever.. Nessa. Carey, The Epigenetics Revolution (2012). The epigenetics revolution is underway.. Nessa. Carey, The Epigenetics Revolution (2012). The production of gametes (sex cells). Males = spermatogenesis in the testes. Females = oogenesis in the ovaries. Mitosis vs Meiosis. (Remember). . Diploid. Contain the full number (set) of chromosomes.