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Exploring Mendelian Genetics 11-3 http://www.eslkidstuff.com/images/tallshort.gif http://sps.k12.ar.us/massengale/genetics%20tutorial.htm
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GENES are more complicated than Mendel thought ____________________________ the ________________________. = ________________________ Genes ________ the ______ for development, but how plan unfolds also _______ on ______________conditions. “Nature vs Nurture” ENVIRONMENT influences expression of genes provide plan depends environmental
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GENES are more complicated than Mendel thought Some traits have ____________ allele __________ = ____________________ EX: blood type Allele choices ___ ___ ___ MULTIPLE ALLELE TRAIT A BO MORE than 2 choices
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GENES are more complicated than MENDEL thought Some traits are determined by ____________________________ = __________________ EX: human height. intelligence, skin & eye color http://www.bcps.org/offices/lis/models/life/images/grow.JPG POLYGENIC TRAIT MORE THAN ONE GENE
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GENES are more complicated than MENDEL thought Traits determined by ____________ _________ have _____ “___________” phenotypes http://www.newtonswindow.com/problem-solving.htm There aren’t just SMART people and DUMB people…. there is a ________________ of intelligences in-between MORE than ONE gene many in-between whole range
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GENES are more complicated than MENDEL thought KINDS OF DOMINANCE ____________________ COMPLETE DOMINANCE INCOMPLETE DOMINANCE CO-DOMINANCE
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COMPLETE DOMINANCE __________ allele _______ the ___________ one PATTERN ? ____________ allele ________ in a _____ratio in the ____ generation Dominant masks recessive Recessive returns 3:1 F2F2 http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookTOC.html
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INCOMPLETE DOMINANCE __________ expected _____ ratio in F 2 generation _____________ organisms with one dominant and one recessive allele show a _________ in-between trait BLENDED DON’T SEE 3:1 Heterozygous Image modified from: http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookTOC.html
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Incomplete Dominance
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CO-DOMINANCE _______ traits are expressed at ___________ (_____________________) in heterozygote A ________HORSE has ______________ hair and __________ hair side by side BOTH SAME TIME ROAN BOTH RED WHITE NO BLENDING
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Co-Dominance Roan Horse
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Erminette Chickens
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CO-DOMINANCE Both traits are expressed together (NO BLENDING) in heterozygote Persons with an A allele AND a B allele have blood type AB
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Membrane proteins with _______ attached that help cells recognize self = ______________ GLYCOPROTEINS http://www.mannanw.com/super-sugars.htm REMEMBER sugars
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BLOOD TYPES have more than 2 allele choices = _________________________ The pattern of sugars that is attached is determined by genes Allele choices are: _____________ ABO MULTIPLE ALLELE TRAIT
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BLOOD TYPES An A allele tells the cell to put “A” glycoproteins on its surface
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BLOOD TYPES A B allele tells the cell to put a different “B” glycoprotein on its surface
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BLOOD TYPES An O allele tells the cell NOT to put anything on the surface
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A and B are CO-DOMINANT A cell with BOTH an A and a B allele has BOTH “A” and “B” glycoproteins on its surface
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BLOOD TYPES & ALLELES GENOTYPE PHENOTYPE (BLOOD TYPE) AA AO BB BO OO AB A A B B O
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B and O see A as Different! IMMUNE SYSTEM ATTACKS! Body images modified from: http://www.new-fitness.com/images/body_shapes.jpg A and AB see A as “like me” DONOR BLOOD
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A and O see B as Different! IMMUNE SYSTEM ATTACKS! Body images modified from: http://www.new-fitness.com/images/body_shapes.jpg B and AB see B as “like me” DONOR BLOOD
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Body images modified from: http://www.new-fitness.com/images/body_shapes.jpg YOU DON’T HAVE ANYTHING I DON’T HAVE! ____ can donate to EVERY BLOOD TYPE = _____________________ Nothing on surface to recognize as “NOT SELF” UNIVERSAL DONOR O DONOR BLOOD
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A, B, and O see AB as Different! IMMUNE SYSTEM ATTACKS! Body images modified from: http://www.new-fitness.com/images/body_shapes.jpg Only AB sees AB as “like me” DONOR BLOOD
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Body image modified from: http://www.new-fitness.com/images/body_shapes.jpg ______ can RECEIVE FROM EVERY BLOOD TYPE = ________________________ UNIVERSAL RECIPIENT ABAB AB can only GIVE to AB BUT...
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BLOOD TYPE FREQUENCY IN USA http://www.reachoutmichigan.org/funexperiments/agesubject/lessons/newton/BldTyping.html A40% B10% AB4% O46%
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ABO SYSTEM is NOT THE ONLY ONE Rh + Rh -
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MOM is _____ & BABY is ____ OTHER BLOOD TYPES ____________________ IF: Image modified from: http://www.wsd1.org/lessonplans/images/Body.gif MOM is _____ & BABY is _____ Rh + Rh - NO PROBLEMS
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Can be a ___________ IF: Mom is _____ Baby is _____ Image modified from: http://www.wsd1.org/lessonplans/images/Body.gif 1 st baby OK but few baby cells entering mom’s bloodstream put mom’s immune system on alert for + cells. Next + baby, mom’s immune system can attack baby as it is growing Mom given shot after 1 st birth prevents this Rh+ PROBLEM Rh -
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DIHYBRID CROSSES ( 2 traits) http://mac122.icu.ac.jp/BIOBK/BioBookgenintro.html
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Mendel also asked the question? Does the gene that determines if a seed is round or wrinkled have anything to do with the gene for seed shape? Must a seed that is yellow also be round?
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MAKING A CROSS with ___________________= ____________________ A Punnett square for a DIHYBRID CROSS looks like this: DIHYBRID CROSS TWO gene traits
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Go to Section: Section 11-3 Figure 11-10 Independent Assortment in Peas
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1. ___________ what _________________ are 2. ________correct__________ square __________ 3. ______ possible_______________________ 4. ______ boxes with _____________________ 5. Determine ____________of_____________& ____________ LET’S MAKE A DIHYBRID CROSS HOMOZYGOUS YELLOW ROUND rryy HOMOZYGOUS GREEN WRINKLED Figure out parent alleles Choose Punnett size Put in parent gametes Fill in offspring combinations probabilities phenotypes genotypes RRYY
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LAW OF __________________________ the factors are distributed to gametes independently of other factors INDEPENDENT ASSORTMENT Image modified from: http://anthro.palomar.edu/mendel/mendel_1.htm
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R R Y YR R Y Y HOMOZYGOUS ROUND YELLOW PRACTICE MAKING GAMETES WHAT ARE THE POSSIBLE GAMETES THIS PARENT CAN MAKE ? Each gamete should get one of each kind of gene ___________ ____________ _____________ _____________ R YR Y R YR Y R YR YR YR Y
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r r y yr r y y HOMOZYGOUS WRINKLED GREEN PRACTICE MAKING GAMETES WHAT ARE THE POSSIBLE GAMETES THIS PARENT CAN MAKE ? Each gamete should get one of each kind of gene ___________ ____________ _____________ _____________ r y r yr y r yr yr yr y
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R r Y yR r Y y HETEROZYGOUS ROUND YELLOW PRACTICE MAKING GAMETES WHAT ARE THE POSSIBLE GAMETES THIS PARENT CAN MAKE ? Each gamete should get one of each kind of gene ___________ ____________ _____________ _____________ R YR Y r yr y r Yr YR yR y
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ry RY 100% of offspring = _______ genotype _______________________ phenotype RrYy ROUND YELLOW RrYy RrYy RrYyRrYy RrYy RrYy
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R r Y yR r Y yR r Y yR r Y y HETEROZYGOUS ROUND YELLOW MAKE ANOTHER CROSS X
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POSSIBLE PARENT GAMETES? RYRY ryry RyRy rYrY
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RYRyrYry RY Ry rY ry Sign of a ______________________ cross is a _____________ ratio in offspring. 9:3:3:1 ____ Round & Yellow ____ Round & green ____ Wrinkled & yellow ____ wrinkled & green 9 3 3 1 RRYY RRYy RrYYRrYy RRYy RRyy RrYy Rryy RrYY RrYy rrYY rrYy RrYy Rryy rrYy rryy heterozygous dihybrid
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__________ratio is a clue that it’s a ____________________________cross ____ ____________ TRAIT 1 ; ____________ TRAIT 2 ____ ____________ TRAIT 1; _____________ TRAIT 2 9 3 3 1 9:3:3:1 HETEROZYGOUS TWO gene dominant dominant recessive recessive dominant recessive
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PRACTICE MAKING GAMETES for DIHYBRID CROSSES http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookTOC.html
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pure round & pure tall = __________ ____ ____ ___________ What gametes can it produce? What are the possible gametes? R R T T R T R TR TR TR T
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Heterozygous Tall = __________ & pure round ____ ____ ___________ What gametes can it produce? What are the possible gametes? T t R R T R t Rt Rt Rt R
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Hybrid tall = __________ & pure wrinkled ____ ____ ___________ What gametes can it produce? What are the possible gametes? T t r r T r t rt rt rt r
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Heterozygous tall = __________ & hybrid round ____ ____ ___________ What gametes can it produce? What are the possible gametes? T t R r T RT r t rt rt Rt R
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SOUTH DAKOTA CORE SCIENCE STANDARDS 9-12.L.1.1. Students are able to relate cellular functions and processes to specialized structures within cells. Storage and transfer of genetic information LIFE SCIENCE: Indicator 1: Understand the fundamental structures, functions, classifications, and mechanisms found in living things
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Core High School Life Science Performance Descriptors High school students performing at the ADVANCED level: predict how traits are transmitted from parents to offspring High school students performing at the PROFICIENT level: explain how traits are transmitted from parents to offspring; High school students performing at the BASIC level identify that genetic traits can be transmitted from parents to offspring;
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SOUTH DAKOTA ADVANCED SCIENCE STANDARDS 9-12.L.2.1A. Students are able to predict the results of complex inheritance patterns involving multiple alleles and genes. (SYNTHESIS) Examples: human skin color, polygenic inheritance LIFE SCIENCE: Indicator 2: Analyze various patterns and products of natural and induced biological change.
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