Cootie Genetics.

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Presentation transcript:

Cootie Genetics

What happened to the traits from the Cootie from the East? Hypothesize what happened to the traits Design an experiment to test that hypothesis Predict your results based on your hypothesis Conduct your experiment

Mating the second generation Cooties To make a cootie baby: 1.) Both mom and day reach into cup #1 and bring out a body color factor (red or blue cube), the information will be recorded on the computer 2.) Both mom and day reach into cup #2 and bring out the ear type factor (white or black cube), record this information 3.) Both mom and day reach into cup #3 and bring out the eye type factor (purple or yellow cube), record this information 4.) Both mom and day reach into cup #4 and bring out the mouth type factor (light green or orange cube), record this information 5.) Both mom and day reach into cup #5 and bring out the foot type factor (brown or green cube), record this information What does your baby look like? Was your hypothesis supported or refuted? Do you need to make more babies to figure out what is going on? Remember, keep it random, nature cannot pick out specific trait factors. Make 40 babies total.

Why are their two color cubes in your cups?

Cootie from the East Cootie from the West Red R Blue r Wide Ear W Bow w Plain eye P Lashes p Lips L Tongue l Boots B Feet b Cootie Traits

Cootie Data Total # of RRRrrRrrRedblue WWWwwWwwWide-earbow PPPppPppPlain-eyelashes LLLllLllLipstongue BBBbbBbbBootsfeet

What does it all mean Trend—30:10 ratio of traits from the east versus traits from the west—or 3:1 ratio of dominant to recessive phenotypes Trend—10:10:10:10 ratio of trait factors RR, Rr, rR, rr—or 1:1:1:1 ratio. Rr and rR are the same thing– 1:2:1 ratio of Homozygous dominant (RR) to Heterozygous (rR & rR) to Homozygous recessive (rr) genotypes

Punnett Square for the Homozygous Cooties—first generation mating R R r r Cootie from the East Cootie from the west R R R R R rr r r r

Punnett Square for the Heterozygous Cooties—second generation mating R R r r First Generation Offspring R R R r r r R r r R R r r