7. A sheep germ cell has a diploid number of 54 chromosomes,
Complete the following table by stating the number of cells, the number of chromatids,
and the number of chromosomes at the end of each of the following stages of meiosis
and mitosis.

Meiosis:
Telophase 1
Prophase

Mitosis:
Telophase

Number of Cells
Number of Chromatids
Number of Chromosomes
For each stage.

Keeping in mind the life cycle of bacteriophages, consider the following problem: during the reproductive cycle of a temperate bacteriophage, the viral dna inserts into the bacterial chromosome where the resultant prophage behaves much like a trojan horse. it can remain quiescent, or it can become lytic and initiate a burst of progeny viruses. several operons maintain the prophage state by interacting with a repressor that keeps the lytic cycle in check. insults (ultraviolet light, for example) to the bacterial cell lead to a partial breakdown of the repressor, which in turn causes the production of enzymes involved in the lytic cycle. as stated in this simple form, would you consider this system of regulation to be operating under positive or negative control?

Restriction enzymes are used in making recombinant dna. describe the role restriction enzymes perform when constructing recombinant dna.

Describe how a non-resistant staphylococcus aureus bacterium can produce a bacterium that is resistant to methicillin