“Meiosis and Genetic Diversity in the Model Organism‚ Sordaria fimicola” November 4‚ 2013 Biology 110- Basic Concepts and Biodiversity Fall 2013 I. Introduction The Earth is home to various forms of life contributing to the endless biodiversity that we see in our daily lives. In environments around the world there are distinct correlations between the environment and adaptations acquired by the organisms that live there. It has been shown that these adaptations
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Unit 3 Lecture Study Guide 1. List the 4 primary tissue types and give the general characteristics and functions of each one. Nerve Tissue: transmit nerve impulses; coordinates and regulates body activities‚ bind and support nerve tissue; carry on phagocytosis; connect neurons to blood vessels‚ changes shape from squamous to cuboidal Epithelial Tissue: covers all free body surfaces and lines organs‚ anchored to connective tissue by basement membrane‚ lacks blood vessels‚ can reproduce
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Unit 2 Lecture Study Guide 1) What are the parts of an atom? Where are the subatomic particles found? Parts of an atom- divided into two basic regions: 1. the central nucleus (contains heavy particles) 2. the electron cloud (contains very light‚ moving particles) Subatomic particles: 1.Protons (found in the central nucleus) 2.neutrons (found in the central nucleus) 3.electrons (spin rapidly in a cloud around the central nucleus) 2) How does the Atomic Mass # differ from the Atomic
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BLUEPRINT OF LIFE: CHAPTER 2 GENETICS Gregor Mendel’s experiments helped advance our knowledge of the inheritance of characteristics 2.1 GREGOR MENDEL AND THE BIRTH OF GENETICS Gregor Mendel (1822-84) – ‘the father of genetics’ Born in Austria He was an Augustinian monk He worked as a teacher and as an investigator He observed the growth of peas He recorded the ratios of characteristics that appeared in the offspring His discovery stated he observed a pattern in the inheritance of characteristics
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granulosa cell (follicle cell) Granulosa cells make hormones estrogen and progesterone Figure 46.12 When a female is born all of her eggs are arrested in prophase of meiosis 1 Every month about 13 eggs begin to continue meiosis . When the egg is ovulated it goes all the way to metaphase 2 then stops Break down of cyclin allows meiosis to complete Uterus Lining is called endometrium Functional layer: layer that comes of during menstruation Vagina Opening to female reproductive tract Clitoris Has spongy
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Meiosis and Genetic Diversity in Sordaria 979554296 Biology 110 Lab Introduction: In Israel there exists multiple spots in the mountains called Evolution Canyons‚ which are all located between a southern facing slope (SFS) and a northern facing slope (NFS). What’s particularly interesting about these locations is that despite the two slopes being on opposite sides of a small canyon‚ they exhibit extremely contrasting conditions. The SFS receives multiple times the UV radiation from the sun
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Spermatogenesis From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search Seminiferous tubule with maturing sperm. H&E stain. Spermatogenesis is the process by which male primordial germ cells called spermatogonia undergo meiosis‚ and produce a number of cells termed spermatozoa. The initial cells in this pathway are called primary spermatocytes. The primary spermatocyte divides into two secondary spermatocytes; each secondary spermatocyte then divides into two spermatids. These develop
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iences ife Sc L Guide Study 12 Grade © Department of Basic Education 2012 s fe Science Li e Study Guid 12 Grade © Department of Basic Education 2012 First published by the Department of Basic Education in 2012 222 Struben Street‚ Pretoria South Africa enquiries Office of the Director General Mr P.B. Soobrayan Email: njobe.p@dbe.gov.za Email: whittle.g@dbe.gov.za Tel: (012) 357 4010 Fax: (012) 323 5837 http://www.education.gov.za Call Centre: 0800202933 Copyright ©Department of Basic Education
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doesn’t happen. 44. Draw Prophase‚ Metaphase‚ Anaphase‚ and Telophase/Cytokinesis and explain what happens during each stage [BACK OF PAPER] 45. Compare and contrast mitosis and meiosis * Mitosis: cell divides only once and the result is exactly the same as the previous. It produces identical diploids * Meiosis: cell divides twice and it produces non-identical haploids. Synapses (pairing of homologous chromosomes) and Crossing over happen here 47. What is crossing over‚ why is it important
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the fungus to form a network of cells called a mycelium. During the sexual phase‚ cell fusion results in the formation of a single-celled‚ diploid zygote encased in an ascus (plural‚ asci). Within the ascus‚ each single-celled zygote undergoes meiosis and gives rise to four haploid cells. These haploid cells then undergo a single round of mitotic division and give rise to a total of eight haploid ascospores with thick cell walls in each ascus. Many of these rod-shaped asci‚ each with eight
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