Question

17 multiple choice 1 point during meiosis, dna replication occurs: prior to meiosis i and meiosis ii prior to meiosis ii after synapsis has taken place prior to meiosis i 18 multiple choice 1 point a cell has all of its chromosomes aligned at the equatorial plate. you conclude the cell is in: interphase anaphase prophase metaphase 19 multiple answer 1 point based on what you have learned about cancer and normal cell division, which of the following strategies do you think would be valuable in fighting cancer? (choose all that apply) program your immune system to kill the cancer cells restore the cancer cells checkpoint machinery prevent the cancer cells from dividing restore the cancer cells apoptosis (suicide) pathway

Explanation:

• Question 17: During meiosis, DNA replication occurs only once, prior to meiosis I. In meiosis II, there is no DNA replication. Synapsis (pairing of homologous chromosomes) occurs after DNA replication in meiosis I.
• Question 18: In metaphase (of mitosis or meiosis), chromosomes are aligned at the equatorial plate. In interphase, chromosomes are in a less - condensed form and not aligned. In anaphase, chromosomes are moving apart. In prophase, chromosomes are condensing but not yet aligned.
• Question 19:
• Programming the immune system to kill cancer cells (immunotherapy) is a valid strategy.
• Restoring checkpoint machinery can help control the cell cycle of cancer cells.
• Preventing cancer cells from dividing (e.g., by targeting cell - cycle regulators) is a good approach.
• Restoring apoptosis (suicide pathway) can make cancer cells self - destruct.

Answer:

1. Prior to meiosis I
2. metaphase
3. program your immune system to kill the cancer cells, restore the cancer cells’ checkpoint machinery, prevent the cancer cells from dividing, restore the cancer cells’ apoptosis (suicide) pathway