Program version 3 // Suzy Student, CSE 138, Spring 2094 // Prints several figures, with methods for structure and redundancy. public class Figures3 { public static void main(String[] args) { egg(); teaCup(); stopSign(); hat(); } // Draws the top half of an an egg figure. public static void eggTop() { System.out.println(" ______"); System.out.println(" / \\"); System.out.println("/ \\"); } // Draws the bottom half of an egg figure. public static void eggBottom() { System.out.println("\\ /"); System.out.println(" \\______/"); } // Draws a complete egg figure. public static void egg() { eggTop(); eggBottom(); System.out.println(); } ... 51
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25. Murre Egg
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STEPS 1. SPERM COME IN CONTACT WITH THE OUTSIDE LAYER OF THE EGG 2. ACROSOMAL ENZYMES ARE RELEASED- EATS THROUGH OUTER LAYER of egg 3. SPERM NUCLEUS ENTERS EGG CELL 4. SPERM & EGG NUCLEI FUSE
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Human Fertilization Sperm need to go through both corona radiata and zona pellucida before entering the egg. Need large number of sperm to get through to the egg. After sperm enters, 1. egg prevents additional sperm from getting in, 2. second meiotic division occurs, 3. the egg is fertilized, producing the zygote.
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Genomes and Meiosis  Sex – – – cells are sperm and egg. Sperm and egg only receive one set of that individual’s genes. When haploid egg joins with haploid sperm (fertilization), a diploid zygote results. The zygote receives half of its genome from the sperm and half of its genome from the egg.  Has 10-7 a unique set of genes, different from the parents Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
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Developmental Aspects of Reproductive System • Determination of genetic sex (cont.) – If fertilizing sperm delivers an X chromosome, fertilized egg will contain XX, and embryo will develop ovaries • X egg + X sperm  XX (female offspring) – If fertilizing sperm delivers a Y chromosome, fertilized egg will contain XY, and embryo will develop testes • X egg + Y sperm  XY (male offspring) – SRY gene is master switch on Y chromosome that initiates testes development and maleness • So, father determines sex of child © 2016 Pearson Education, Inc.
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V. PREFERENTIAL INVESTMENT B. THROUGH SIBLICIDE MORE AGGRESSIVE INDIVIDUALS IN NEST ACTIVELY KILL SIBLINGS IS THIS A PARENTAL STRATEGY???? e.g., Boobies *masked boobies: exhibit early siblicide -in these species, asynchronous egg-laying female lays first egg then incubates female lays second egg then incubates first egg hatches first, so young will be larger than second chick -first chick eventually pushes second chick out of nest where it dies *blue-footed boobies: no early siblicide Will cross fostering result in different rates of early siblicide? SO PARENTS CAN (AND DO) INTERFERE
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Rules of the Competition 1. A container must be purchased 2. All materials must remain inside chosen container 3. Container cannot be larger than largest cup provided 4. No external heat sources may be used 5. Start recording data when container cover is closed and egg is inside 6. Container may not be held or covered during temperature readings Declaration of 7. Egg may not be returned to water (no “restarts”) winners 8. At least one cup must be used 9. Egg shell may not be cracked 10. Container must remain on surface of testing area 11. Thermocouple must only be taped to surface of egg shell Design Specs. Disqualifications
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Rules of the Competition 1. Design Specs. Disqualifications Declaration of winners All materials must remain inside chosen container 2. Container cannot be larger than largest cup provided 3. No external heat sources may be used 4. Start LabVIEW program when container cover is closed and egg is inside 5. Container may not be held or covered during temperature readings 6. Egg may not be returned to water (No “restarts”) 7. At least one cup must be used 8. Egg shell may not be cracked 9. Container must remain on surface of testing area 10. Thermocouple must only be taped to surface of egg shell
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Rules of the Competition Design Specs. Disqualifications 1. A container must be purchased 2. All materials must remain inside chosen container 3. Container cannot be larger than largest cup provided 4. No external heat sources may be used 5. Start LabVIEW program when container cover is closed and egg is inside Declaration of 6. Container may not be held or covered during temperature readings winners 7. Egg may not be returned to water (No “restarts”) 8. At least one cup must be used 9. Egg shell may not be cracked 10. Container must remain on surface of testing area 11. Thermocouple must only be taped to surface of egg shell
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35. Oiled Common Murre
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36. Murre in Net
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37. Murre with 6-pack plastic ring
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Meanwhile, back in the uterus   1 & 2) High levels of estrogen stimulate the endometrium to grown, thicken, and form glands that will eventually secrete substances to nourish the embryo. 3) Progesterone secreted by corpus luteum stimulates glands of the endometrium to start secreting nourishing substances  If egg is fertilized, about 6 days after ovulation, the fertilized egg arrives in a uterus well-equipped to nourish and cradle it  If no egg, CL continues to produce estrogen and progesterone for 10-12 days  4) If no pregnancy, hormone output of CL declines sharply at the end of the luteal phase. The uterine lining can’t be maintained and is shed. Immediately after, a new lining starts to form.
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The Early Embryo In the fertilized egg the pronuclei of the sperm cell and egg cell are not visible. The micrograph on the right contains a fertilized egg and the embryo that results from the first cell division. Note the fertilization membrane visible around the 2 cell embryo.
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