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Download 4/20 & 4/21 - 7th Grade Agenda
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1/18 & 1/19 - 7th Grade Agenda Collect HW Genetic Activities Worksheet Collect Late Science Fair Background Human Traits Genetic Traits Activity Video: Ligers + Hybrid Animals Pass Back HW & Test & Grade Printout Text Book Reading: 192 – 198 HW: Reading & Notetaking p. 101 – 104 HW: Signature on Grade Printout Reminder Procedure, Data Table, Graph & Results due 2/9 & 2/10 (15 Points) Last Day to Turn in Latework for this Semester 1/20 & 1/21 Reflection • Prompt: Draw and write 3 features about a hybrid animal you would like to create. DNA vs RNA DNA • Master Copy • Two Strands • Never leave nucleus RNA • Copy • One Strand • Leaves the nucleus Step 1 in Protein Synthesis • Messenger RNA Production Step 2 in Protein Synthesis • Messenger RNA attaches to a Ribosome Step 3 in Protein Synthesis • Transfer RNA attaches to a Messenger RNA Step 4 in Protein Synthesis • Protein Grows Mutation Mutation • Mutation means “cha_____” nge in Latin • Mutation can cause a cell to produce an tein incorrect pro____ during protein synthesis. • As a result, the organism’s trait, or type may be pheno____, different from what it normally would have been. Hybrid Animals Horse Mule Donkey • All male and most female mules are infertile • More intelligent than a donkey • More endurance than a horse • Requires less food than a horse Ligers = Male Lion + Female Tiger More Ligers Tigon = Male Tiger + Female Lion Zorse = Male Zebra + Female Horse Wholphin = Dolphin + False Killer Whale False Killer Whale Wholphin Dolphin Wolfdog = Wolf + dog House Cat + African Cat African Cat Tangelo = Tangerine + Grape Fruit 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 do humans have? • 23 Scientific Process • • • • • Observe Pose a Question Develop a Hypothesis Predict Experiment and collect data Scientific Inquiry • Scientific Inquiry refers to the diverse ways in which scientists inve_______ stigate the natural world and pose expl__________ anations based on the evidence they gather. 1st Step: Posing Questions • Scientific Inquiry often begins with a problem or question about an obse_________. rvation 2nd Step: Hypothesis • Hypothesis is a possible expl_______ anations for a set of observation or answer to a scientific question 3rd Step: Design an Experiment • An experiment in which only one var______ iable is manipulated at a time is called a controlled experiment • Why is only one variable manipulated? 4th Step: Collecting and Interpreting Data • Data are the facts, figures, and other dence gathered evi_______ through observations. • It is usually a data or a chart 5th Step: Drawing Conclusions • A conclusion is a summary of what you rned from have lea_____ an experiment. 6th Step: Communicating • Communicating is sharing of ideas and experimental findings with others through writing and sp______. eaking pH • pH: means potential of hydrogen (Positive Ion) – – – – Scale goes from 0 to 14 0: Very acidic (hydrochloric acid) 7: Neutral (Water) 14: Very basic or alkaline (Drain Cleaner) What are properties of an acid? • It tastes sour • It reacts with metals and carbonates • It turns blue litmus red. What are some common use of acids ? What are properties of a bases? • • • • It tastes bitter Slippery feel Reacts with acids Turns red litmus blue What are some common use of bases ?