just did this..
03-14-2008, 05:40 PM
Not sure how much this will make sense typed out, but here goes:
1. I start with a matching game of pictures of some of my friends and their kids. The students have to match the kid to the parent. Then we discuss what they used to identify the pairs. (traits)
2.Survey inherited traits in the class. Tally. (left/right handed, earlobes attached or unattached, etc.)
3. We play rock paper scissors to discuss dominant(what wins out)
4. We go back over #2 and try to see based on numbers what traits in the class we think were dominant and "won" most of the time.
5. Punnett squares (use very basically to show dominant and recessive and how each offspring gets one gene from their parent for each trait)- make sure you relate the Punnett square to probability in Math.
6. We create our own aliens. I give the students two Alien parents' and give them the genotype for about nine traits on the parents (body type, head type, ears, mouth, feet, etc). The students roll a dice to see which gene they will get from the mom. Even #s gets the dominant gene, odd #s gets the recessive gene. Then they repeat for dad. Next, they write the genotype for each trait of their offspring. THEN, I show them the recessive and dominant pictures of each trait. They draw their new alien offspring and we post them all together with the parents to show all the different possibilities of offspring from one set of parents.
Brainpop also has a good video on DNA.
Sorry this is long. I won't have access to our school computer for this week, or I would post the papers that go with these activities and it might make more sense.