We have been out of school for a week for our Spring Break holiday. A week prior to the break, my biology I class started growing some corn seeds for our lab, The Effect of Environment on Gene Expression. This lab requires 2 observations after the corn starts to grow. We did the first observation over a week ago. Today we did the second observation, collected our data and wrote our lab reports. We expected to get a 75%:25% ratio of green stems to albino stem. Our actual data came very close to this. Here are a couple of photos of the growing corn:
The students really love doing this lab. Many of them took their corn home with them! A good extension of this would be to do a chi-square analysis of the data. This particular class is not prepared for that kind of data analysis, so I did not do it with this class. Maybe next year!
After we finished the lab, we did a practice problem worksheet on Codominance and Multiple Alleles. I am giving a quiz on these types of problems tomorrow. Good luck everyone!
Practice Problem Worksheet on Codominance and Multiple Alleles
Quiz: Incomplete Dominance and Codominance
Quiz: Multiple Alleles and Sex-linkage