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Student Data Sheet How Do You Wear Your Genes - A Reebop Activity Objectives: 1. 2. All students will understand that meiosis causes genetic variation among offspring. Using Mendel’s Law of Independent Assortment and the Law of Segregation, students will select one chromosome from each parental pair to make their unique offspring. Reebop Chromosome Decoder Table 1 Directions: You will use the information in Table 1 to complete Table 2 Physical Trait Product Used Dominant trait Recessive trait Antennae Green Toothpicks 2 antennae no antennae Body segments Large white marshmallows 3 body segments 2 body segments Sex Use a pink pipe cleaner for a girl Reebop or a Blue pipe cleaner for a boy Reebop. Use the same pipe cleaner that was used for the tail. Red and Yellow ball top straight pins Push pins (blue and red) Curly Straight Red Nose Yellow Nose Blue legs Red legs Tail Nose Legs Eyes Sticky wobbly eyes 2 eyes 1 eye Hump Small green marshmallows 1 hump 3 humps Possible Genotypes and Phenotypes AA = 2 antennae Aa = 2 antennae aa = no antennae BB = 3 body segments Bb = 3 body segments bb = 2 body segments XX = girl XY = boy TT = Curly Tt = Curly tt = straight NN = Red nose Nn = Red nose nn = yellow nose LL = Blue legs Ll = Blue legs ll = Red legs EE = 2 eyes Ee = 2 eyes ee = 1 eye HH = 1 hump Hh = 1 hump hh = 3 humps Student Data Sheet Reebop Student Activity Data Sheet Procedures for making the Baby Reebop 1. Working in pairs, one student should take the envelope labeled Mom (You will be the Mother Reebop) and the other student should take the envelope labeled Dad (You will be the Dad Reebop). 2. Remove the chromosomes from your envelope and place them face down on your desk, in pairs, and according to their size. 3. Each parent should select one chromosome from each pair and place the unselected chromosomes back into the envelope. At this time the mother Reebop (student ) should record the selected allele symbols in the column titled “Allele selected from Mother Reebop”. The Father Reebop should also record the selected allele symbols in the column titled “Allele selected from Father Reebop”. 4. Both parents (students) will then place their selected chromosomes together in homologous pairs. (These pairs will represent the chromosomes for their Baby Reebop). 5. Using the selected alleles from your homologous chromosome pairs, complete the genotype and phenotype columns in table number 2. Use table 1 to determine the phenotype for each of your Baby Reebop genotypes. 6. Using the material in your Ziploc bag, construct your Baby Reebop using the phenotype column in table 2 as your guide. 7. Use the picture in the bag or observe the Mother and Father Reebops to guide you as you construct your Baby Reebop. 8. Use the plain toothpicks as ligaments to hold the marshmallows together. 9. Place your Baby Reebop in the nursery provided by your teacher. Table 2: Allele symbols A ,a B, b T, t N, n L, l E, e H, h X, Y Allele selected from Mother Reebop Allele Selected from Father Reebop Genotype of Baby Reebop Phenotype of Baby Reebop Student Data Sheet Cleanup procedures: 1. Place all chromosomes back into the appropriate envelope. Count to make sure that each envelope contains either 16 pink chromosomes or 16 blue chromosomes. 2. Place all unused materials in the plastic Ziploc bag.
