Day 2 - (Drosophila Computer Lab) The students create their own virtual fly crosses and write down the results Day 2 - (Drosophila Computer Lab) The students use a computer program to simulate mutant fly crosses Day 2 - (Drosophila Lab) The students check the results of their F2 flies Day 2 - (Drosophila Lab) The students count several F2 fly crosses Day 2 - (Drosophila Lab) The students count their F1 progeny to check for dominant and recessive traits Day 2 - (Drosophila Lab) The students observe sex-linkage in their F1 flies Day 2 - (Drosophila Lab) The students write down their findings in their lab notebook Day 2 - (Metaphase Chromosome Lab) A microscopic view of the HeLa cell chromosomes Day 2 - (Metaphase Chromosome Lab) A view of the chromosomes the students counted to check for abnormalities Day 2 - (Metaphase Chromosome Lab) Sandra demonstrates how to view the chromosomes on the phase contrast microscopes Day 2 - (Metaphase Chromosome Lab) Sandra explains the protocol for the second half of the metaphase chromosome experiment Day 2 - (Metaphase Chromosome Lab) The students drop their cells on a glass slide to break them open and expose the chromosomes