We started class with a warm up asking you to write down everything you know about how we get our eye color. If you want to learn more about some interesting genetics questions you can link to http://www.thetech.org/genetics/asklist.php.
Next we discussed the reading, 15.1 and 15.2. Most students did not have any questions from 15.1, but 15.2 was a struggle. I went through an example on the board, first showing what would happen during meiosis if two genes were not on the same chromosome (not linked) and then repeated the exercise for when they are on the same chromosome (linked). This resulted in two different expected outcomes of a cross. I used this example to introduce crossover and explain how crossover during meiosis results in new combinations of alleles on a chromosome.
Finally we went over how to determine the relative locations of genes on a chromosome based on their crossover rate.
For homework I asked students to make sure they understood problems 1-5 (ignore #6) from the homework linked on the last post.
On Monday I will address any questions on the homework before we complete a lab activity (don't get too excited, it is based on pictures of fungal spores :))
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