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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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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GENETICS CELL ORGANELLES ETC. CHAPTER 4: Cell Division and Reproduction related PP: cell division 4.1 - Cell Division and Genetic Material TERMS: Genetics: the study of heredity and variation of living organisms and how genetic information is passed from one generation to the next Somatic cell: a plant or animal cell that forms the body of the organism; excludes reproductive cells Chromosome: a structure in the nucleus that contains DNA Sister chromatid: one of two chromosomes that
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representing an inactivated X chromosome. 3.chromosome theory of inheritance: generalization that genes are located on chromosomes and that the behavior of chromosomes during meiosis and fertilization accounts for inheritance patterns 4.crossing over: process in which homologous chromosomes exchange portions of their chromatids during meiosis 5.cytogenetic maps: a chart of a chromosome that locates genes with respect to chromosomal features distinguishable in a microscope 6.deletion: change to a chromosome
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Background DNA is an abbreviation for deoxyribonucleic acid‚ but it is usually known by its initials alone. DNA is found in practically all living organisms‚ and it is now known to carry genetic information from one cell to the next‚ and from one generation to the next. The units of inheritance‚ called genes‚ are actually sections of the DNA molecule. Nuclei of the cells of higher organisms contain thread-like bodies called chromosomes‚ which consist of DNA‚ wrapped around proteins. So understanding how
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FEEDBACK COMPARISON REQUESTS WORDPRESS PLUGIN LOG IN Diffen Compare Anything ›› vs. Aerobic vs Anaerobic Respiration Aerobic RespirationAnaerobic Respiration Diffen › Science › Biology Cellular respiration is the set of the metabolic reactions and processes that take place in organisms’ cells to convert biochemical energy from nutrients into adenosine triphosphate (ATP)‚ and then release waste products. It is one of the key ways a cell gains useful energy. Comparison chart Embed this
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