1. Reebops

2.  Today you are going to take an active part in the conception and birth of a Reebop. A Reebop is a small organism that lives in Junior High School students’ backpacks. You probably haven’t seen one, because they are extremely small. They are known for eating homework and notes from home. Perhaps you have one living amongst your belongings.  Both parents are heterozygous. They each carry a dominant gene and a recessive gene for each trait. Their phenotype (how they look) follows the dominant gene (allele) causing them to look alike. They will pass one gene down from each parent to their offspring (their baby). Your Reebop Backpack from http://freebies2deals.com/2012/08/complete-list-of-backpack-deals-going-on-this-week.html

3.  Create a Punnett square for each of the 11 traits, representing all combinations of alleles the two parents could make. Procedure Remember: both parents are heterozygous carry a dominant gene and a recessive gene for each trait they pass one gene down from each parent Antennae is Aa for heterozygous A A a aa A A A a a a A

4.  Some traits are codominate, what does that mean?  How will that change the Punnett square?  How will that affect the baby?  Do you see any traits that are codominate on the chart?  Do you need to go back and change any of your Punnett Squares?  Find the answers before moving forward from here. Make sure to tell Mrs. Barker what you found out! Codominate Stop signs from http://www.clker.com/clipart-2766.html

5.  Copy the data table into your Science notebook Data Table TraitFemale GeneMale GeneGenotypePhenotype Leg Color Leg Size Eyes Humps Tail Leg # Wing # Body Segment Nose Antennae Sex

6.  Obtain a coin from your teacher. Remember the parents are heterozygous for all the Reebop traits.  Flip the coin for each parent for each trait.  Using the chart write down what allele goes with the coin toss. Continue until all traits are done.  Write the genotype in the genotype column (put the two letters together that you got from the flip).  Then write the phenotype (appearance) in the phenotype column. Procedure RYRY Red EXAMPLE

7. The Charts TraitHeadsTails Leg ColorRY Leg SizeLl EyesEe HumpsMm TailTt Leg #Nn Wing #Ww Body SegmentDd NoseQP AntennaeAa SexXY The chart on the right will tell you what you need to put in your data table for female gene and the male gene. Data Chart

8. The Charts Leg Color RR= red YY= yellow RY= orange Leg Size LL or Ll= long legs ll= short legs Eyes EE or Ee= 2 eyes ee= 3 eyes Humps MM or Mm= 2 humps mm= 3 humps Tail TT or Tt= curly tail tt= straight tail Leg # NN or Nn= 6 legs nn= 4 legs Wing # WW or Ww= 4 wings ww= 2 wings Body Segment DD or Dd= 3 body segments dd= 2 body segments Nose QQ= blue PP= yellow QP= green Antennae AA or Aa= 2 antennae aa= no antennae Sex XX= female XY or YX= male This chart will tell you what phenotype your Reepob has based on the genotype you got when you flipped the coins.

9. Procedure  Circle your baby’s trait on each Punnett square. EXAMPLE R R Y Y RY RR YY Got a Y from the male Got a R from the female So the baby would be this one

10.  Once you have completed your data table and circled all the traits that your baby has on the Punnett squares you get to start creating your baby  The “Rules”  Must use up all the white space  You only get one piece of paper  Must look neat  Remember “ish” is ok Your Reebop