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Download 4/20 & 4/21 - 7th Grade Agenda
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2/29 - 7th Grade Agenda Learning Objective: Learn about Genetic Disorders Collect HW: Reading & Note taking p. 102 – 103 Counselor Presentation Text Book Reading: 195 – 200 HW: Reading & Note taking p. 104 – 106 Reminder HW: Science Fair Project due 3/3 & 3/4 (50 Points) Reflection • Prompt: What are the 4 major blood types for humans? Which blood type is the universal donor blood type? Why? Some human traits are controlled by a single gene that has more than two alleles • Blood type is controlled by three Alleles • What are the major human blood types? • A, B, AB & O • Which human blood type is a universal donor? • Blood Type: O Many human traits are controlled by many genes • Four genes control height in humans • Skin, eye and hair color are controlled by multiple genes What are the Female Sex Chromosomes? • XX What are the Male Sex Chromosomes? • XY • Because there is some missing genetic information in the “Y” chromosomes, Males are more likely to get a sex-linked trait Who determines whether the child is a boy or a girl ? • Father How many pairs of chromosomes to humans have? • 23 Sex Linked Genes • Genes on the X and Y chromosomes are called sex linked genes • Most of the genes on the X chromosomes are not on the Y chromosomes • Since Males have the Y chromosomes they are missing an allele. Red – Green colorblindness • More males have red – green color blindness then females • Why? Red – Green colorblindness Red – Green colorblindness Genetic Disorders – Cystic Fibrosis • Cystic Fibrosis is a disorder in which the body produces abnormally thick mucus in the lun___ gs and intes_____. tines • The thick mucus fills the lungs making it hard for the affect person to breathe. Genetic Disorders – Sickle Cell Disease • Sickle shaped red blood cells clog blood vessels and cannot carry as much ox_____ ygen as normal cells. Genetic Disorders – Hemophilia • People with Hemophilia do not produce one of the ein needed for prot_____ normal clotting. • They can die from simple cuts and bruises Genetic Disorders – Down Syndrome • In Down syndrome, a person’s cells have an extra copy of osome 21 chrom______ • People with Down syndrome have some degree of mental retar________ dation