Chapter 38: Reproduction and Development Computer Test Bank Cryopreservation
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Reproduction Methods
1336 Chapter 43 | Animal Reproduction and Development fertilization. Seahorses, like the one shown in Figure 43.1, provide an example of the latter. Following a mating dance, the female lays eggs in the male seahorse’s abdominal brood pouch where they are fertilized. The eggs hatch and the offspring develop in the pouch for several weeks. 43.1 | Reproduction Methods By the end of this section, you will be able to do the following: • Describe advantages and disadvantages of asexual and sexual reproduction • Discuss asexual reproduction methods • Discuss sexual reproduction methods Animals produce offspring through asexual and/or sexual reproduction. Both methods have advantages and disadvantages. Asexual reproduction produces offspring that are genetically identical to the parent because the offspring are all clones of the original parent. A single individual can produce offspring asexually and large numbers of offspring can be produced quickly. In a stable or predictable environment, asexual reproduction is an effective means of reproduction because all the offspring will be adapted to that environment. In an unstable or unpredictable environment asexually-reproducing species may be at a disadvantage because all the offspring are genetically identical and may not have the genetic variation to survive in new or different conditions. On the other hand, the rapid rates of asexual reproduction may allow for a speedy response to environmental changes if individuals have mutations. An additional advantage of asexual reproduction is that colonization of new habitats may be easier when an individual does not need to find a mate to reproduce. During sexual reproduction the genetic material of two individuals is combined to produce genetically diverse offspring that differ from their parents. -
When Does Human Life Begin? Christian Thinking and Contemporary Opposition
Salt&Light series When does human life begin? Christian thinking and contemporary opposition JOHN R LING Salt&Light series When does human life begin? Christian thinking and contemporary opposition JOHN R LING The substance of this booklet is an extract from The Morning-After Pill – Uncovering the Truth, published by The Christian Institute in 2007: http://www.christian.org.uk/resource/the-morning-after-pill Copyright © The Christian Institute 2017 The author has asserted his right under Section 77 of the Copyright, Designs & Patents Act 1988 to be identified as the author of this work. First printed in June 2011 Reprinted in May 2015 and August 2017 ISBN 978-1-901086-47-8 Published by The Christian Institute Wilberforce House, 4 Park Road, Gosforth Business Park, Newcastle upon Tyne, NE12 8DG All rights reserved No part of this publication may be reproduced, or stored in a retrieval system, or transmitted, in any form or by any means, mechanical, electronic, photocopying, recording or otherwise, without the prior permission of The Christian Institute. All scripture quotations, unless otherwise indicated, are taken from the HOLY BIBLE, NEW INTERNATIONAL VERSION®. NIV®. Copyright © 1973, 1978, 1984 by International Bible Society. Used by permission of Zondervan. All rights reserved. The Christian Institute is a Company Limited by Guarantee, registered in England as a charity. Company No. 263 4440, Charity No. 100 4774. A charity registered in Scotland. Charity No. SC039220 Contents 5 1 . Introduction 7 2 . The answer from the Bible 17 3 . The view of the early church 21 4 . The drift from the biblical worldview 25 5 . -
Oogenesis [PDF]
Oogenesis Dr Navneet Kumar Professor (Anatomy) K.G.M.U Dr NavneetKumar Professor Anatomy KGMU Lko Oogenesis • Development of ovum (oogenesis) • Maturation of follicle • Fate of ovum and follicle Dr NavneetKumar Professor Anatomy KGMU Lko Dr NavneetKumar Professor Anatomy KGMU Lko Oogenesis • Site – ovary • Duration – 7th week of embryo –primordial germ cells • -3rd month of fetus –oogonium • - two million primary oocyte • -7th month of fetus primary oocyte +primary follicle • - at birth primary oocyte with prophase of • 1st meiotic division • - 40 thousand primary oocyte in adult ovary • - 500 primary oocyte attain maturity • - oogenesis completed after fertilization Dr Navneet Kumar Dr NavneetKumar Professor Professor (Anatomy) Anatomy KGMU Lko K.G.M.U Development of ovum Oogonium(44XX) -In fetal ovary Primary oocyte (44XX) arrest till puberty in prophase of 1st phase meiotic division Secondary oocyte(22X)+Polar body(22X) 1st phase meiotic division completed at ovulation &enter in 2nd phase Ovum(22X)+polarbody(22X) After fertilization Dr NavneetKumar Professor Anatomy KGMU Lko Dr NavneetKumar Professor Anatomy KGMU Lko Dr Navneet Kumar Dr ProfessorNavneetKumar (Anatomy) Professor K.G.M.UAnatomy KGMU Lko Dr NavneetKumar Professor Anatomy KGMU Lko Maturation of follicle Dr NavneetKumar Professor Anatomy KGMU Lko Maturation of follicle Primordial follicle -Follicular cells Primary follicle -Zona pallucida -Granulosa cells Secondary follicle Antrum developed Ovarian /Graafian follicle - Theca interna &externa -Membrana granulosa -Antrial -
Unit6:Human Reproduction Pregnancy and Embryonic Development Parturition and Lactation
H.S SECOND YEAR Unit6:Human Reproduction Pregnancy and embryonic development Parturition and lactation BY: Dr. LUNA PHUKAN HUMAN FERTILIZATION AND DEVELOPMENT Key Terms Term Meaning Gamete : A reproductive (sex) cell. In males, sperm; in females, eggs Fertilization : The process in sexual reproduction in which a male gamete and female gamete fuse to form a new cell Zygote : Cell resulting from fertilization Diploid (2n) : Cell that contains two sets of homologous chromosomes Haploid (n) : Cell that contains only a single set of genes Apoptosis :The process of programmed cell death Differentiation : The process by which cells become specialized in structure and function Human fertilization and development Fertilization is the process in which haploid gametes fuse to form a diploid cell called a zygote. To ensure that each zygote has the correct number of chromosomes, only one sperm can fuse with one egg. Stages of human development Zygotic stage: The zygote is formed when the male gamete (sperm) and female gamete (egg) fuse. Blastocyst stage: The single-celled zygote begins to divide into a solid ball of cells. Then, it becomes a hollow ball of cells called a blastocyst, attaching to the lining of the mother's uterus. Embryonic stage: The major internal organs and external features begin to emerge, forming an embryo. In this stage, the heart, brain, and spinal cord become visible. Arms and legs start to develop. Fetal stage: Once the formed features of the embryo begin to grow and develop, the organism is considered a fetus. Differentiation and specialization of structures happens during this time. REPRODUCTIVE SYSTEM REVIEW Key terms Term Meaning Gamete: A reproductive (sex) cell. -
The Reproductive System
PowerPoint® Lecture Slides prepared by Meg Flemming Austin Community College C H A P T E R 19 The Reproductive System © 2013 Pearson Education, Inc. Chapter 19 Learning Outcomes • 19-1 • List the basic components of the human reproductive system, and summarize the functions of each. • 19-2 • Describe the components of the male reproductive system; list the roles of the reproductive tract and accessory glands in producing spermatozoa; describe the composition of semen; and summarize the hormonal mechanisms that regulate male reproductive function. • 19-3 • Describe the components of the female reproductive system; explain the process of oogenesis in the ovary; discuss the ovarian and uterine cycles; and summarize the events of the female reproductive cycle. © 2013 Pearson Education, Inc. Chapter 19 Learning Outcomes • 19-4 • Discuss the physiology of sexual intercourse in males and females. • 19-5 • Describe the age-related changes that occur in the reproductive system. • 19-6 • Give examples of interactions between the reproductive system and each of the other organ systems. © 2013 Pearson Education, Inc. Basic Reproductive Structures (19-1) • Gonads • Testes in males • Ovaries in females • Ducts • Accessory glands • External genitalia © 2013 Pearson Education, Inc. Gametes (19-1) • Reproductive cells • Spermatozoa (or sperm) in males • Combine with secretions of accessory glands to form semen • Oocyte in females • An immature gamete • When fertilized by sperm becomes an ovum © 2013 Pearson Education, Inc. Checkpoint (19-1) 1. Define gamete. 2. List the basic components of the reproductive system. 3. Define gonads. © 2013 Pearson Education, Inc. The Scrotum (19-2) • Location of primary male sex organs, the testes • Hang outside of pelvic cavity • Contains two chambers, the scrotal cavities • Wall • Dartos, a thin smooth muscle layer, wrinkles the scrotal surface • Cremaster muscle, a skeletal muscle, pulls testes closer to body to ensure proper temperature for sperm © 2013 Pearson Education, Inc. -
N Wa Brahma/Atman
NÜ Wa God Brahma/Atman HUMANHUMAN EMBRYOLOGYEMBRYOLOGY Department of Histology and Embryology Jilin University ChapterChapter 11 IntroductionIntroduction toto HumanHuman EmbryologyEmbryology 1.1. WhatWhat isis EmbryologyEmbryology?? ontogenesis ovumovum Zygote/fertilizedZygote/fertilized ovumovum spermsperm NineNine monthsmonths (266(266 daysdays oror 3838 weeksweeks toto bebe exact)exact) inin thethe uterusuterus InfantInfant fetusfetus 1.1. WhatWhat isis EmbryologyEmbryology?? Traditional /descriptive embryology focuses on understanding the basic structural pattern of the embryonic body. Teratology is concerned with the reasons, mechanisms and protective measures of malformations. Comparative embryology seeks several general rules by comparison the identities or the differences among the development of many species. Experimental embryology researches on the causative factors in development by posing hypotheses and testing them with different experimental techniques. Chemical embryology researches on the changes of some chemical materials in cells or tissues and the chemical basis of morphogenesis during the development . Molecular embryology focuses on the molecular mechanisms of morphogenesis, and the gene regulation of embryonic development. Reproductive biology emphases on normal gametogenesis, endocrinology of reproduction, transport of gametes and fertilization, early embryonic development, and implantation of the mammalian embryo, in addition to more practically oriented problems involving techniques of fertilization and -
The Human Reproductive System
ANATOMY- PHYSIOLOGY-REPRODUCTIVE SYSTEM - IN RESPONSE TO CONVID 19 APRIL 2, 2020 nd Dear students and parents, April 2 , 2020 Beginning two days prior to our last day at school I issued work packets to all students in all classed; the content of which was spanning a two-three week period. Now that our removal from school will continue to at least May 1st, I have provided the following work packets which will span the remainder of the year, should our crisis continue. The following folders are available: ANATOMY – PHYSIOLOGY 1. Packet – THE HUMAN REPRODUCATIVE AND ENDOCRINE SYSTEMS. 2. Packet- THE HUMAN NERVOUS SYSTEM 3. Packet handed our prior to our last day: THE HUMAN EXCRETORY SYSTEM ZOOLOGY 1. Packet- STUDY OF THE CRUSTACEANS 2. Packet- STUDY OF THE INSECTS 3. Packet- handed our prior to our last day- INTRODUCTION TO THE ARTRHROPODS- CLASSES MYRIAPODA AND ARACHNIDA AP BIOLOGY – as per the newly devised topics of study focus, structure of adapted test, test dates and supports provided as per the guidelines and policies of The College Board TO ALL STUDENTS! THESE PACKETS WILL BE GUIDED BY THE SAME PROCEDURES WE EMBRACED DURING FALL TECH WEEK WHERE YOU ARE RESPONSIBLE FOR THE WORK IN THE PACKETS- DELIVERED UPON YOUR RETURN TO SCHOOL OR AS PER UNFORESEEN CHANGES WHICH COME OUR WAY. COLLABORATION IS ENCOURAGED- SO STAY IN TOUCH AND DIG IN! YOUR PACKETS WILL BE A NOTEBOOK GRADE. EVENTUALLY YOU SHALL TAKE AN INDIVIDUAL TEST OF EACH PACKET = AN EXAM GRADE! SCHOOL IS OFF SITE BUT NOT SHUT DOWN SO PLEASE DO THE BODY OF WORK ASSIGNED IN THE PACKETS PROVIDED. -
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EFFECT OF BUSULPHAN ON THE DEVELOPING OVARY IN THE RAT B. N. HEMSWORTH and H. JACKSON Experimental Chemotherapy, Paterson Laboratories, Christie Hospital, Manchester 20 (Received 8th February 1963) Summary. Female rats were exposed to Busulphan on selected days between the 5th day of foetal life and Day 15 post partum, inclusive. The drug apparently had no effect on the foetal sex cells when admini- stered to the pregnant female between Days 5 and 7 post coitum. Later in pregnancy a destructive action became rapidly more powerful. So far as the developing ovary is concerned it would seem that the action of Busulphan at this dose level, i.e. 10 mg/kg intraperitoneally, is confined to the precursor of the oocyte, namely the oogonium and that when these cells enter meiotic prophase on about the 17th day of foetal life there is a marked decrease in their sensitivity to the action of the drug. The effect of the treatment on fertility has also been studied. INTRODUCTION The effect of Busulphan on the foetal ovary was described by Bollag (1954). He reported that a single dose given to pregnant rats 5 to 7 days ante partum resulted in sterility in the offspring. Later, Galton & Till (1956) stated that "earlier in pregnancy quite large doses do not interfere with its course and the F1 and F2 generations were apparently healthy". In view of these studies, it was decided to investigate the sensitivity of the proliferating cell systems of the gonad during development. A preliminary report of these investigations has been published elsewhere (Hemsworth & Jackson, 1962a). -
Numerical Response 1. Provide the Number of the Reproductive Structure That Is Directly Affected by Each Technology Named Below
Bio 30 Reproduction Exams – January January 1996 Use the following information to answer the next two questions. The Male Reproductive System The Female Reproductive System Numerical Response 1. Provide the number of the reproductive structure that is directly affected by each technology named below. (Record your four-digit answer in the numerical-response section of the answer sheet.) Reproductive structure: ______5__ ____7____ __1____ ___8_____ Technology: Vasectomy Tubal ligation Castration Use of an intrauterine device (IUD) 1. The birth control pill prevents the maturation and release of ova. The structure that is directly affected by the birth control pill is A. structure 6, because ova are produced by follicles in this organ B. structure 6, because this organ will secrete excess estrogen and progesterone C. structure 8, because implantation will not occur in this organ unless ovulation occurs D. structure 8, because follicular development is controlled by feedback from this organ 2. The vas deferens is most similar in function to which female reproductive organ? A. Ovary B. Uterus C. Vagina D. Fallopian tube Use the following information to answer the next question. Possible Effects of Testosterone 1 Inhibits skeletal muscle development 2 Enhances skeletal muscle development 3 Inhibits development of body hair 4 Promotes development of body hair 5 Inhibits gametogenesis 6 Stimulates gametogenesis 7 Enhances growth of the larynx 8 Inhibits growth of the larynx Numerical Response 2. Select all the correct effects of normal levels of testosterone in an adolescent male. (Record your answer in lowest-to-highest numerical order in the numerical-response section of the answer sheet.) Answer: __2467_____ Use the following information to answer the next two questions. -
Embryology Text Books: Implications for Fetal Research Dianne N
The Linacre Quarterly Volume 61 | Number 2 Article 6 May 1994 "New Age" Embryology Text Books: Implications for Fetal Research Dianne N. Irving Follow this and additional works at: https://epublications.marquette.edu/lnq Recommended Citation Irving, Dianne N. (1994) ""New Age" Embryology Text Books: Implications for Fetal Research," The Linacre Quarterly: Vol. 61 : No. 2 , Article 6. Available at: https://epublications.marquette.edu/lnq/vol61/iss2/6 "New Age" Embryology Text Books: Implications for Fetal Research by Dianne N. Irving, M.A., Ph.D. The author is Assistant Professor, History ofPhilosophy/Bioethies at De Sales School of Theology, Washington, D. C. As outrageous as it is that so much incorrect science has been and still is being used in the scientific, medical and bioethics literature to argue that fetal "personhood" does not arrive until some magical biological marker event during human embryological development, now we can witness the "new wave" consequences of passively allowing such incorrect "new age" science to be published and eventually accepted by professionals and non-professionals alike. Once these scientifically erroneous claims, and the erroneoliS philosophical and theological concepts they engender, are successfully imbedded in these bodies of literature and in our collective consciousnesses, the next logical step is to imbed them in our text books, reference materials and federal regulations. Such is the case with the latest fifth edition of a highly respected embryology text book by Keith Moore - The Developing Human. 1 This text is used in most medical schools and graduate biology departments here, and in many institutions abroad. Several definitions and redefinitions of scientific terms it uses are incorporated, it would seem, in order to support the "new age" political agenda of abortion and fetal research. -
Physiology of Reproduction: Gametogenesis and the Female Cycles
ighapmLre43pg317_320 5/12/04 3:35 PM Page 317 impos03 302:bjighapmL:ighapmLrevshts:layouts: NAME ___________________________________ LAB TIME/DATE _______________________ REVIEW SHEET Physiology of Reproduction: exercise Gametogenesis and the Female Cycles 43 Meiosis 1. The following statements refer to events occurring during mitosis and/or meiosis. For each statement, decide if the event oc- curs in (a) mitosis only, (b) meiosis only, or (c) both mitosis and meiosis. c 1. dyads are visible b 2. tetrads are visible a 3. product is two diploid daughter cells b 4. product is four haploid daughter cells c 5. involves the phases prophase, metaphase, anaphase, and telophase a 6. occurs throughout the body b 7. occurs only in the ovaries and testes a 8. provides cells for growth and repair b 9. homologues synapse and chiasmata are seen b 10. daughter cells are quantitatively and qualitatively different from the mother cell a 11. daughter cells are genetically identical to the mother cell c 12. chromosomes are replicated before the division process begins b 13. provides cells for replication of the species b 14. consists of two consecutive nuclear divisions, without chromosomal replication occurring before the second division 2. Describe the process of synapsis. The homologous chromosomes become closely aligned along their entire length. 3. How does crossover introduce variability in the daughter cells? Where crossovers occur, chromosome breakage occurs and parts are exchanged. This results in chromosomes with different parental contributions. 4. Define homologous chromosomes. Chromosomes that carry genes for the same traits. (One ϭ paternal chromosome, the other maternal chromosome.) Review Sheet 43 317 ighapmLre43pg317_320 5/14/04 11:53 AM Page 318 impos06 302:bjighapmL:ighapmLrevshts:layouts: Spermatogenesis 5. -
New Insights Into Human Early Embryo Development: a Particular Theoretical Study
14 International Journal of Modern Anthropology Int. J. Mod. Anthrop. (2018) Vol: 2, Issue No: 11, pp: 14 - 46 Available online at: www.ata.org.tn ; DOI: http://dx.doi.org/10.4314/ijma.v2i11.1 Original Synthesis Article New insights into human early embryo development: a particular theoretical study Hassen Chaabani Laboratory of Human Genetics and Anthropology, Faculty of Pharmacy, University of Monastir, 5000 Monastir, Tunisia. E.mail: [email protected] (Received 18 January 2018; Accepted 5 Mars 2018; Published 5 May 2018) Abstract – The experimental research on the subject of human early embryo development has been remained insufficient because of ethical norms and legal constraints. In this context, the carrying out of theoretical studies could speed up the slow knowledge progression on this subject. Thus, I present here a particular model of theoretical study based on a synthesis of selected published experimental results combined with what has been provided from my interpretation of scientific signs masked in some Qur‟an verses. In the obtained detailed scenario, I consider that the third cleavage, resulting in 8 blastomeres, is coupled to a particular rearrangement in which 2 daughter cells seem move down and 2 others move up; while the 4 remaining cells seem stay at their initial position (I called them “4 HI cells”). Nevertheless, I consider that the fourth cleavage, resulting in 16 blastomeres, is coupled to a rearrangement that gives the impression of a harmonious descent: in fact, one of each two daughter cells seems pushed down. This descent materializes a morula top–bottom axis, which will go to coincide with the embryo-abembryo axis of the blastocyst.