i just took it and thought that the G chem and O chem were relatively easy, I only missed one in both sections. But I had a little more trouble with the bio section. Question 28 in particular is bothering me. I thought that diploids have two copies of each chromosome and that each chromosome contained a copy of a gene at its locus. So if each chromosome has one copy of the gene, that would make the two alleles that diploids have for each gene. But this question says that a single chromosome usually carries two alleles of each gene. Is that right?