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Human Heredity
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Poll the Audience YOYO: A.B.C. List 3 Genetic Diseases/Disorders
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Has one dominate gene. PP ZZ Ll Oo Dominate Disorders
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Dwarfism
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Polydactyl: Many Digets Syndactyly
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Symrachyclactyly: Missing fingers
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Familial Hypercholesterdemia Familial Hyper-cholesterolemia – High blood cholesterol and propensity for heart disease
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Hypertension
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Chronic Simple Glaucoma Chronic Simple Glaucoma – Drainage system for fluid in the eye does not work and pressure builds up, leading to damage of the optic nerve which can result in blindness.
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Huntington’s Disease Nervous system degeneration. Causes early death. Onset in middle age. Irregular gait Shaking Emotionally fragile Dementia
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Neurofibromatosis Benign tumors in skin or deeper
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Progeria Progeria – Drastic premature aging, rare, die by age 13. Symptoms include limited growth, small face and jaw, wrinkled skin, atherosclerosis, and cardiovascular problems but mental development not affected.
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Recessive Disorders Has 2 recessive genes.
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Examples of Recessive Disorders Tay Sachs Disease – Lacks of enzyme needed to break down lipids necessary for normal brain function. Common in Ashkenazi Jews Blindness, seizures, paralysis, and early death.
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Congenital Disorders A congenital disorder, or congenital disease, is a condition before birth. Mental Retardation Club Foot Co-joined Twins Cleft Lip Down Syndrome
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http://video.search.yahoo.com/video/play?p=youtube%3A+abby+and+brittany+conjoined+twins&vid=cccb340ce1e1cb3a385bbf4f36095d41&l=5%3A04&turl=http%3A%2F%2Fts1.mm.bing.net%2 Fth%3Fid%3DVN.608014211029929380%26pid%3D15.1&rurl=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DtPWPbGYIwBU&tit=YouTube+Conjoined+Twins+Abby+%26+Brittany+H ensel+turn+16&c=7&sigr=11bkcdvn6&sigt=11mndlt39&sigi=11r0ihq0k&back=http%3A%2F%2Fus.yhs4.search.yahoo.com%2Fyhs%2Fsearch%3Fp%3Dyoutube%253A%2Babby%2Band%2Bbrit tany%2Bconjoined%2Btwins%26type%3Dastydef%26param1%3D1%26param2%3Dcd%253D2XzuyEtN2Y1L1QzutCzztDtAyBtA0Bzyzy0FyBzzyByE0B0FtN0D0Tzu0StCtDtCtDtN1L2XzutAtFtBt FtCtFyDtN1L1CzutCyEtBzytDyD1V1StN1L1G1B1V1N2Y1L1Qzu2StBtAyBtDzzzyzytBtGtAtCyC0CtGyDtDzyzytGyB0EtCyCtGyCyCtDyBzytB0FyBzztAyCtA2QtN1M1F1B2Z1V1N2Y1L1Qzu2SyE0 EtB0A0D0ByDyDtGyByCyBtCtGyE0D0F0FtGzztCtAtAtG0DyByC0C0CyByEzz0CtB0FtD2Q%2526cr%253D332307325%2526ir%253D142905_b%2526elng%253Den%2526elcl%253Dus%2526a %253Dggfc%2526uref%253Dsp05%2526f%253D4%2526cat%253Dweb%2526ulng%253Den- US%25252Cen%25253Bq%25253D0.8%2526sid%253Dbe8c11df7dd34c7719fd966e5885d581%2526stype%253Dastydef%2526sesid%253Df5ea16941f3fbe17fd5fa9f3b9a9caec%2526csr%25 3D0%2526ipblock%253D0%2526b%253DChrome%2526bv%253D40.0.2214.94%2526os%253DWindows%252B7%2526cc%253Dus%2526ip%253D68.179.219.250%2526pa%253Dastromend a%26hsimp%3Dyhs-fullyhosted_003%26hspart%3Diry%26ei%3DUTF-8&sigb=1qauvn3ve&ct=p&age=1289524016&fr2=p%3As%2Cv%3Av&hsimp=yhs-fullyhosted_003&hspart=iry&tt=b 5 min video conjoined teenage girls
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Congenital Deafness and Blindness
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Diabetes Mellitus
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Albinism
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Phenylketoneuria (PKU) Inability to break down the amino acid phenylalanine. Must cut protein from diet Results in serious mental retardation
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Cystic Fibrosis Cystic Fibrosis – affects mucus and sweat glands, thick mucus in lungs and digestive tract that interferes with gas exchange, lethal. https://www.youtube.com/watch?v=kCSjfxm1jgY
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Multiple Alleles There are more than 2 alleles for a trait Blood type in humans Blood Alleles? –A, B, O Blood Types? –Type A, Type B, Type AB, Type O
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Rules for Blood Type A and B are codominant –AA = Type A –BB = Type B –AB = Type AB A and B are dominant over O –AO = type A –BO = type B –OO = type O
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B. How many people are color blind ? A. What is color blindness? C. What careers can’t you do if you are color blind? D. Who is more likely to be color blind? Boys/girls? E. What are the most colors that color blind people can’t see? F. What countries have the most people that are color blind? G. Is there a cure for color blindness? Can it be prevented?
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Can You see the Number? Colorblindness is an X-linked recessive trait.
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Traits found on the X chromosome
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Genetics The study of heredity and the variation of inherited characteristics
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Heredity Passing on traits from parent to offspring.
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Phenotype The physical characteristics of a trait. The one you see.
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Genotype The genetic makeup of a trait
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Alleles Any of several forms of a gene, that are responsible for hereditary variation. Height: Short –Tall Color Pink-white-mixed
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Gamete Sperm or Ova (egg) that carries genetic that carries ½ the genetic material.
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Zygote New creation formed by sperm and egg joining together
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Homozygous Two identical alleles: WW or ww
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Heterozygous Different alleles (traits) for a gene Ww
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Dominant The trait, allele of a gene that is expressed – the one you can see if there is a dominant allele: W or Ww. aabb Bb BB Recessive Dominate
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Co-dominance The heterozygous condition, both alleles are expressed equally 50/50 1:2 prob. Sickle Cell Anemia in Humans NN = normal cells SS = sickle cells NS = some of each
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Sickle Cell Anemia The disease occurs in 1 out of 500 African Americans. The disease occurs in 1 out of 36,000 Hispanic Americans
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Recessive The trait, allele of a gene that is NOT expressed – the one you CANNOT see unless there is 2 recessive alleles: aabb Bb BB R ecessive Dominate
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Incomplete Dominance The heterozygous is a blend between the dominant and recessive. 75/25, 3 to 1 probability RR = redrr = white Rr = pink
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Trait A genetically determined Characteristics: Phenotype Is from your Genotype
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Karyotypes
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Maps of chromosomes 22 homologous pairs of human chromosomes Sex Chromosomes are the 23 rd pair of chromosomes that determine the sex of an individual.
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Changes in Chromosome Number and Structure Down syndrome is caused by a change in chromosome number.
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Down syndrome (trisomy 21)
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The Frequency of Chromosome Non-Disjunction And Down Syndrome Rises Sharply with Maternal Age The phenomenon is clear – the explanation isn’t.
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// HOW BABY GROWS IN THE WOMB DURING PREGNANCY - How TWINS are made? (Triples, Quads) https://www.youtube.com/watch?v=DZsZ9vXFx04
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Pre-Implantation Genetic Diagnosis (PGD) Removing a cell for diagnosis from a human embryo.
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Amniocentesis and Chorionic Villus Sampling Many new techniques for learning about individual genes rather than whole chromosomes are available or under development.
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Choose the sex of your child
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Dolly: In 1996, Ian Wilmut cloned Dolly from an adult sheep
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CopyCat In February 2002, researchers from Texas A & M reported the live birth of a cloned tabby. Researchers are interested in using cloned cats in AIDS research, since feline AIDS is a good model for human AIDS.
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What kind of plants and animals have been cloned?
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