The concept of genome. Genome size and type. Before E. coli divides its genome replicates, so that for a short period of time a bacterial cell has two chromosomes. I would not call it diploid. Bacteria are always haploid, while eukaryotes may be haploid or diploid.
Bacterial chromosomes are circular molecules of DNA while eukaryotic chromosomes are linear.
What the main features of polytene chromosomes are. The concept of chromatin. Compare the amount of DNA in Figs. Describe the nucleosome. What is represented by the black and white balls in Fig.