Chapter 10: Sexual Reproduction and Genetics
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Research Plant Geneticist, USDA-ARS Professor, Department
ROGER PHILIP WISE Research Plant Geneticist, USDA-ARS Professor, Department of Plant Pathology and Microbiology Iowa State University Ames, IA 50011-1020 Phone: (515) 294-9756 Fax: (515) 294-9420 E-mail: [email protected] ; [email protected] Web: http://wiselab.org/ ; http://barleygenome.org/ Database: http://plexdb.org/ ; http://www.hordeumtoolbox.org/ A. Professional Preparation Michigan State University Physiology B.S. (High Honor), 1972-1976 Michigan State University Genetics Ph.D., 1978-1983 University of Florida Mol Plant-Microbe Interact Postdoctoral, 1984-1986 Max-Planck-Institut, Köln Plant Molecular Biology Postdoctoral, 1987-1989 B. Appointments 2015 – present ST-00 Cat 1 Research Geneticist, USDA-ARS / Professor, ISU 2003-2014 GS-15 Cat 1 Research Geneticist, USDA-ARS / Professor, ISU 2000-2002 GS-14 Cat 1 Research Geneticist, USDA-ARS / Professor, ISU 1998-2000 GS-14 Cat 1 Research Geneticist, USDA-ARS / Associate Professor, ISU 1994-1998 GS-13 Cat 1 Research Geneticist, USDA-ARS / Associate Professor, ISU 1989-1993 GS-12 Cat 1 Research Geneticist, USDA-ARS / Assistant Professor, ISU Iowa State Interdepartmental Program Affiliations: 1990-present Interdepartmental Genetics 1999-present Interdepartmental Bioinformatics & Computational Biology Iowa State Plant Sciences Institute – Center Membership: 1999-present Center for Plant Responses to Environmental Stresses 1999-present Center for Plant Genomics 1999-present Center for Plant Transformation and Gene Expression C. PROFESSIONAL AFFILIATIONS American Association for the Advancement of Science American Phytopathological Society International Society for Molecular Plant-Microbe Interactions Genetics Society of America American Association of Plant Biologists D. HONORS AND AWARDS 2015: Elected Fellow of AAAS 2011: USDA Secretary's Honor Award: Helping America promote sustainable agricultural production and biotechnology exports as America works to increase food security. -
Revised Glossary for AQA GCSE Biology Student Book
Biology Glossary amino acids small molecules from which proteins are A built abiotic factor physical or non-living conditions amylase a digestive enzyme (carbohydrase) that that affect the distribution of a population in an breaks down starch ecosystem, such as light, temperature, soil pH anaerobic respiration respiration without using absorption the process by which soluble products oxygen of digestion move into the blood from the small intestine antibacterial chemicals chemicals produced by plants as a defence mechanism; the amount abstinence method of contraception whereby the produced will increase if the plant is under attack couple refrains from intercourse, particularly when an egg might be in the oviduct antibiotic e.g. penicillin; medicines that work inside the body to kill bacterial pathogens accommodation ability of the eyes to change focus antibody protein normally present in the body acid rain rain water which is made more acidic by or produced in response to an antigen, which it pollutant gases neutralises, thus producing an immune response active site the place on an enzyme where the antimicrobial resistance (AMR) an increasing substrate molecule binds problem in the twenty-first century whereby active transport in active transport, cells use energy bacteria have evolved to develop resistance against to transport substances through cell membranes antibiotics due to their overuse against a concentration gradient antiretroviral drugs drugs used to treat HIV adaptation features that organisms have to help infections; they -
150 Years of Research at the United States Department of Agriculture
United States Department of Agriculture Agricultural Research Service 150 Years of Research at June 2013 the United States Department of Agriculture: Plant Introduction and Breeding I Cover photo: The stately building that once housed the U.S. Department of Agriculture in Washington, D.C., ca. 1890. (This photo is preserved in the USDA History Collection, Special Collections, National Agricultural Library.) II United States Department of Agriculture Agricultural Research Service 150 Years of Research at June 2013 the United States Department of Agriculture: Plant Introduction and Breeding R.J. Griesbach Griesbach is Deputy Assistant Administrator, Office of Technology Transfer, USDA, Agricultural Research Service, Beltsville, MD. i Abstract Griesbach, R.J. 2013. 150 Years of Research at the While supplies last, single copies of this publication United States Department of Agriculture: can be obtained at no cost from Robert J. Griesbach, Plant Introduction and Breeding. U.S. Department USDA-ARS, Office of Technology Transfer, 5601 of Agriculture, Agricultural Research Service, Sunnyside Avenue, Room 4-1159, Beltsville, MD Washington, DC. 20705; or by email at [email protected]. The U.S. Department of Agriculture celebrated its Copies of this publication may be purchased in various 150th anniversary in 2012. One of the primary formats (microfiche, photocopy, CD, print on demand) functions of the USDA when it was established in 1862 from the National Technical Information Service, 5285 was “to procure, propagate, and distribute among the people new Port Royal Road, Springfield, VA 22161, (800) 553- and valuable seeds and plants.” The U.S. Government first 6847, www.ntis.gov. became involved in new plant introductions in 1825 when President John Quincy Adams directed U.S. -
Barbara Mcclintock
Barbara McClintock Lee B. Kass and Paul Chomet Abstract Barbara McClintock, pioneering plant geneticist and winner of the Nobel Prize in Physiology or Medicine in 1983, is best known for her discovery of transposable genetic elements in corn. This chapter provides an overview of many of her key findings, some of which have been outlined and described elsewhere. We also provide a new look at McClintock’s early contributions, based on our readings of her primary publications and documents found in archives. We expect the reader will gain insight and appreciation for Barbara McClintock’s unique perspective, elegant experiments and unprecedented scientific achievements. 1 Introduction This chapter is focused on the scientific contributions of Barbara McClintock, pioneering plant geneticist and winner of the Nobel Prize in Physiology or Medicine in 1983 for her discovery of transposable genetic elements in corn. Her enlightening experiments and discoveries have been outlined and described in a number of papers and books, so it is not the aim of this report to detail each step in her scientific career and personal life but rather highlight many of her key findings, then refer the reader to the original reports and more detailed reviews. We hope the reader will gain insight and appreciation for Barbara McClintock’s unique perspective, elegant experiments and unprecedented scientific achievements. Barbara McClintock (1902–1992) was born in Hartford Connecticut and raised in Brooklyn, New York (Keller 1983). She received her undergraduate and graduate education at the New York State College of Agriculture at Cornell University. In 1923, McClintock was awarded the B.S. -
Reproductive Ecology & Sexual Selection
Reproductive Ecology & Sexual Selection REPRODUCTIVE ECOLOGY REPRODUCTION & SEXUAL SELECTION • Asexual • Sexual – Attraction, Courtship, and Mating – Fertilization – Production of Young The Evolutionary Enigma of Benefits of Asex Sexual Reproduction • Sexual reproduction produces fewer reproductive offspring than asexual reproduction, a so-called reproductive handicap 1. Eliminate problem to locate, court, & retain suitable mate. Asexual reproduction Sexual reproduction Generation 1 2. Doubles population growth rate. Female Female 3. Avoid “cost of meiosis”: Generation 2 – genetic representation in later generations isn't reduced by half each time Male 4. Preserve gene pool adapted to local Generation 3 conditions. Generation 4 Figure 23.16 The Energetic Costs of Sexual Reproduction Benefits of Sex • Allocation of Resources 1. Reinforcement of social structure 2. Variability in face of changing environment. – why buy four lottery tickets w/ the same number on them? Relative benefits: Support from organisms both asexual in constant & sexual in changing environments – aphids have wingless female clones & winged male & female dispersers – ciliates conjugate if environment is deteriorating Heyer 1 Reproductive Ecology & Sexual Selection Simultaneous Hermaphrodites TWO SEXES • Advantageous if limited mobility and sperm dispersal and/or low population density • Guarantee that any member of your species encountered is the • Conjugation “right” sex • Self fertilization still provides some genetic variation – Ciliate protozoans with + & - mating -
Rollins Adams Emerson (1873-1947) Horticulturist Pioneer Plant Geneticist Administrator Inspiring Student Adviser Rosalind Morris University of Nebraska-Lincoln
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Agronomy & Horticulture -- Faculty Publications Agronomy and Horticulture Department 1969 Rollins Adams Emerson (1873-1947) Horticulturist Pioneer Plant Geneticist Administrator Inspiring Student Adviser Rosalind Morris University of Nebraska-Lincoln Follow this and additional works at: http://digitalcommons.unl.edu/agronomyfacpub Part of the Agricultural Science Commons, Agriculture Commons, Agronomy and Crop Sciences Commons, Botany Commons, Horticulture Commons, Other Plant Sciences Commons, and the Plant Biology Commons Morris, Rosalind, "Rollins Adams Emerson (1873-1947) Horticulturist Pioneer Plant Geneticist Administrator Inspiring Student Adviser" (1969). Agronomy & Horticulture -- Faculty Publications. 901. http://digitalcommons.unl.edu/agronomyfacpub/901 This Article is brought to you for free and open access by the Agronomy and Horticulture Department at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Agronomy & Horticulture -- Faculty Publications by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. ROLLINS ADAMS EMERSON (1873-1947) HORTICULTURIST PIONEER PLANT GENETICIST ADMINISTRATOR INSPIRING STUDENT ADVISER This biography was prepared by Rosa I ind Morris Department of Agronomy, University of Nebraska Lincoln, Nebraska 68503 and was presented in part at the Annual Meeting of The Nebraska Academy of Sciences, 1969. An abstract of the talk was published in the Proceedings of The Academy for 1969. ROLLINS ADAMS EMERSON (1873-1947) HORTICULTURIST, PIONEER PLANT GENETICIST, ADMINISTRATOR, INSPIRING STUDENT ADVISER Rosallnd Morris, Department of Agronomy, University of Nebraska, Lincoln, Nebraska The vigorous and highly productive life of Professor R. A. Emerson spanned 74 years and 7 months. His birth and death took place In New York State, but Nebraska nurtured his early development and schooling. -
Cellular Reproduction
572 14 Cellular Reproduction 14.1 The Cell Cycle According to the third tenet of the cell theory, new cells 14.2 M Phase: Mitosis and Cytokinesis originate only from other living cells. The process by which this cell division 14.3 Meiosis occurs is called . For a multicellular organism, such as a human or an oak tree, countless divisions of a single-celled THE HUMAN PER SP ECTIVE: Meiotic Nondisjunction zygote produce an organism of astonishing cellular complexity and Its Consequences and organization. Cell division does not stop with the formation of EXPERIMENTAL PATHWAYS: The Discovery and the mature organism but continues in certain tissues throughout Characterization of MPF life. Millions of cells residing within the marrow of your bones or the lining of your intestinal tract are undergoing division at this very moment. This enormous output of cells is needed to replace cells that have aged or died. Although cell division occurs in all organisms, it takes place very differently in prokaryotes and eukaryotes. We will restrict discussion to the eukaryotic version. Two distinct types of eukaryotic cell division will be discussed in this chapter. Mitosis leads to production of cells that are genetically identical to their parent, whereas meiosis leads to production of cells with half the genetic content of the parent. Mitosis serves as the basis for producing new cells, meiosis as the basis for producing new Fluorescence micrograph of a mitotic spindle that had assembled in a cell-free extract prepared from frog eggs, which are cells that lack a centrosome. The red spheres consist of chromatin-covered beads that were added to the extract. -
RF Annual Report
THE ROCKEFELLER FOUNDATION ANNUAL REPORT FOR 1966 JAN 26 ZD01 2003 The Rockefeller Foundation 31S-3 THE ROCKEFELLER FOUNDATION 111 WEST 50TH STREET, NEW YORK, NEW YORK 10020 PRINTED IN THE UNITED STATES OF AMERICA 2003 The Rockefeller Foundation CONTENTS Trustees, Officers, and Committees, 1966-1967 VIII Officers and Staff, 1966 X THE PRESIDENT'S REVIEW Technology and Nutrition 3 Agriculture as an Industry 4, The Technology of Nutrition 4, New Biological Materials 5, Progress through International Institutes 8, The Search for Quality 11 Toward the Conquest of Hunger 14 Wheat 15, Corn 17, Rice 20, Sorghum and the Millets 23, Potatoes 24, Animal Sciences 27, Nutrition—Protein Sources 29, Institutional Development 31, Schistosomiasis Control 33, Agricultural Economics 35 Problems of Population 38 Teaching and Research in Reproductive Biology and Family Planning 41, Teaching and Research in Demography 47, Training Programs for Professional Personnel 47, Hospital- based Family Planning Programs 49 University Development 52 The University of Ibadan 54, The University of Valle 56, The University of the Philippines 62, Bangkok, Thailand 63, The University of Khartoum 66, Santiago, Chile 68, The University of East Africa 71 Aiding Our Cultural Development 76 Symphonic Music 81, Contemporary Chamber Ensembles 85, Teacher Training and Performer Training 85, Theatre 87, Playwrights 91, Actors and Directors 91, Audience Develop- ment 92, Dance 95, Creative Writing 95, The Humanities and the New Technology 97 Toward Equal Opportunity for All 100 Student -
Cell Life Cycle and Reproduction the Cell Cycle (Cell-Division Cycle), Is a Series of Events That Take Place in a Cell Leading to Its Division and Duplication
Cell Life Cycle and Reproduction The cell cycle (cell-division cycle), is a series of events that take place in a cell leading to its division and duplication. The main phases of the cell cycle are interphase, nuclear division, and cytokinesis. Cell division produces two daughter cells. In cells without a nucleus (prokaryotic), the cell cycle occurs via binary fission. Interphase Gap1(G1)- Cells increase in size. The G1checkpointcontrol mechanism ensures that everything is ready for DNA synthesis. Synthesis(S)- DNA replication occurs during this phase. DNA Replication The process in which DNA makes a duplicate copy of itself. Semiconservative Replication The process in which the DNA molecule uncoils and separates into two strands. Each original strand becomes a template on which a new strand is constructed, resulting in two DNA molecules identical to the original DNA molecule. Gap 2(G2)- The cell continues to grow. The G2checkpointcontrol mechanism ensures that everything is ready to enter the M (mitosis) phase and divide. Mitotic(M) refers to the division of the nucleus. Cell growth stops at this stage and cellular energy is focused on the orderly division into daughter cells. A checkpoint in the middle of mitosis (Metaphase Checkpoint) ensures that the cell is ready to complete cell division. The final event is cytokinesis, in which the cytoplasm divides and the single parent cell splits into two daughter cells. Reproduction Cellular reproduction is a process by which cells duplicate their contents and then divide to yield multiple cells with similar, if not duplicate, contents. Mitosis Mitosis- nuclear division resulting in the production of two somatic cells having the same genetic complement (genetically identical) as the original cell. -
Fishery Science – Biology & Ecology
Fishery Science – Biology & Ecology How Fish Reproduce Illustration of a generic fish life cycle. Source: Zebrafish Information Server, University of South Carolina (http://zebra.sc.edu/smell/nitin/nitin.html) Reproduction is an essential component of life, and there are a diverse number of reproductive strategies in fishes throughout the world. In marine fishes, there are three basic reproductive strategies that can be used to classify fish. The most common reproductive strategy in marine ecosystems is oviparity. Approximately 90% of bony and 43% of cartilaginous fish are oviparous (See Types of Fish). In oviparous fish, females spawn eggs into the water column, which are then fertilized by males. For most oviparous fish, the eggs take less energy to produce so the females release large quantities of eggs. For example, a female Ocean Sunfish is able to produce 300 million eggs over a spawning cycle. The eggs that become fertilized in oviparous fish may spend long periods of time in the water column as larvae before settling out as juveniles. An advantage of oviparity is the number of eggs produced, because it is likely some of the offspring will survive. However, the offspring are at a disadvantage because they must go through a larval stage in which their location is directed by oceans currents. During the larval stage, the larvae act as primary consumers (See How Fish Eat) in the food web where they must not only obtain food but also avoid predation. Another disadvantage is that the larvae might not find suitable habitat when they settle out of the ~ Voices of the Bay ~ [email protected] ~ http://sanctuaries.noaa.gov/education/voicesofthebay.html ~ (Nov 2011) Fishery Science – Biology & Ecology water column. -
Cellular Reproduction Vocabulary Date:______Use Page Numbers! Assignment #______Block #____ WORD DEFINITION
Name:_________________________ Cellular Reproduction Vocabulary Date:_________________________ Use Page Numbers! Assignment #_________ Block #____ WORD DEFINITION 1. Cell Cycle The life cycle of a cell Pg 92 2. The structures that DNA is organized into Chromosomes Pg 92 Cellular reproduction in prokaryotic cells. Means “Splitting into two 3. Binary Fission parts” Pg 92 Each chromosome of a pair of similar chromosome 4. Homologous Chromosomes Pg 93 The two copies of the chromosome once it is duplicated 5. Chromatids Pg 93 Where the chromatids are connected 6. Centromere Pg 93 7. Mitosis The complicated process of separating duplicated chromosomes Pg 93 8. Cytokinesis The process where the cytoplasm splits in two Pg 95 WORD DEFINITION 9. Budding A type of asexual reproduction, where a piece of the parents body Pg 612 develops into an independent organism 10. A type of asexual reproduction, where the organism breaks into two or Regeneration more parts, each growing into a new organism that is genetically identical (fragmentation) to the parent Pg 612 The production of offspring by combining the genetic material of more 11. Sexual than one parent reproduction Pg 613 A single parent has offspring that are identical to itself 12. Asexual reproduction Pg 613 The male sex cell 13. Sperm Pg 613 The female sex cell 14. Egg Pg 613 The new type of cell that is made when an egg’s nucleus fuses with a 15. Zygote sperm’s nucleus Pg 613 16. Spores Small reproductive cells that are protected by a thick cell wall Pg 256 WORD DEFINITION 17. Sex Cells Specialized cells that combine to form a zygote, they have half the normal Pg 114 number of chromosomes, one of each pair. -
Reproduction in Plants and Animals
Reproduction in Plants and Animals Imagine a gardener checking on his growing plants at the beginning of spring. He notices a few tiny insects eating some of his plants. The gardener isn’t worried—a few insects are not a concern. But when he comes back several weeks later, his plants are covered in these small insects. There are at least ten times as many insects as there were several weeks ago! Where did all of these insects come from? How do organisms make more of their species? Reproduction produces offspring Reproduction is a process by which an organism produces offspring, or young. All organisms reproduce. If they didn’t, no species would survive past a single generation. The tiny insects developing Reproduction allows organisms to pass on their traits, or inside these eggs will grow characteristics to their offspring. Parents pass on their into adult insects. traits through their genetic material, or DNA. Sexual Reproduction requires two parents Sexual reproduction requires a male and female. Each parent contributes half of their genetic material, or DNA, to their offspring. The female contributes her DNA in an egg cell. The male contributes his DNA in a sperm cell. When the egg and sperm combine, they form the new offspring. Offspring may look similar to their parents, but they are not exact copies. In sexual reproduction, each offspring has a mixture of its parent’s traits. Parents may pass on dominant traits or recessive traits to their offspring. Each offspring may be different from its siblings. For These puppies are a product example, suppose the father in a human family does not of sexual reproduction have freckles, but his wife does.