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WELCOME BACK!!! In Activity: Mendel & His Work

WELCOME BACK!!! In Activity: Mendel & His Work. Pick up your sheet from countertop Read the FRONT Complete the BACK side by creating your own pea plant crosses for each generation. Genetics – The Study of Heredity. TEKS 6F

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WELCOME BACK!!! In Activity: Mendel & His Work

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  1. WELCOME BACK!!!In Activity: Mendel & His Work • Pick up your sheet from countertop • Read the FRONT • Complete the BACK side by creating your own pea plant crosses for each generation.

  2. Genetics – The Study of Heredity TEKS 6F Predict possible outcomes of various genetic combinations such as monohybrid crosses, dihybrid crosses, and non-Mendalian inheritance

  3. Mendel cross-pollinated pea plants • He cut away the male parts of one flower, then dusted it with pollen from another

  4. Mendel’s Conclusions • He concluded that factors(traits) are passed from one generation to the next.

  5. Genetics Unit Overview Video Clip:Monohybrid & Dihybrid Crosses

  6. Types of Allelepairing Homozygous (purebred) both alleles are the same (BB – Brown eyes) (bb – blue eyes) Heterozygous (hybrid) two different alleles (Bb – Brown eyes)

  7. Outward appearance Physical characteristics Examples: 1.Brown eyes 2.blue eyes Arrangement of genes that produces the phenotype Example: 1. BB, Bb 2. bb Genotype Phenotype

  8. B b BB Bb B Bb x Bb Bb bb b Monohybrid Cross BB= homozygous dominant; 1of 4 = 25% Bb= heterozygous dominant; 2 of 4 = 50% bb= homozygous recessive; 1 of 4 = 25% Chances of Brown Eyes: 3 of 4 = 75% Chances of Blue Eyes: 1 of 4 = 25%

  9. DihybridCross: RrYyxRrYy CROSSES WITH TWO DIFFERENT TRAITS Here’s your game plan: FIRST: FOIL the parent alleles just like you do for polynomials in math class (Rr) (Yy) x (Rr) (Yy) First: RY RY Outer: RyRy Inner: rYrY Last: ryry

  10. RY Ry rY ry RY Ry rY ry DihybridCross: RrYy x RrYy SECOND: take your results from your FOILing and place them on the sides of your Punnett square! Add like letters to like letters in the boxes. RRYY

  11. RY Ry rY ry Smooth/Yellow: 9 of 16 Smooth/green: 3 of 16 wrinkled/Yellow: 3 of 16 wrinkled/green: 1 of 16 RY RRYY RRYy RrYY RrYy Ry RRYy RRyy RrYy Rryy rY RrYY RrYy rrYY rrYy ry RrYy Rryy rrYy rryy 9:3:3:1 phenotypic ratio Dihybrid Cross THIRD: Complete your Punnett square! Use the results to analyze phenotypic& genotypic outcomes.

  12. Dihybrid Cross: crosses with two different traits

  13. Genetics Unit Overview Video Clip:Dihybrid Cross SHORT CUT…

  14. Let’s Practice Predicting Probability of Dihybrid Crosses: ACTIVITIES: Guinea Pig Dihybrid Cross Practice (Notes) Dihybrid Cross Worksheet Turn-in #2 ONLY above for a Grade

  15. EXIT TICKET: Punnett Square Practice • Do BOTHsides by completing monohybrid/dihybrid genetic crosses. • What you don’t finish will be H.W. due 1/14/14

  16. H.W. Due 1/14/14 • FinishPunnett Square Practice Handout • Study Quizlett.com Vocabulary Words for Genetics • Quiz #1: Meiosis & Genetics is 1/14/14 • KIM Blocks will be done next week • Study Quizlet.com • Search “rrisd biology” • Select “Genetics”

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