Meiosis worksheet illustrating the stages of cell division with labeled diagrams and questions for students.

1. According to Model 1, in what type of organs are the cells that enter meiosis I found?
- The cells that enter meiosis I are found in the gonads (testes and ovaries), which are the reproductive organs.

2. Considering what already knows about mitosis in cells, what event must take place during interphase before a cell proceeds to division?
- During interphase, the cell must replicate its DNA (chromosomes) to ensure that each daughter cell receives a complete set of genetic material.

3. What two structures make up a single replicated chromosome?
- A single replicated chromosome is made up of two sister chromatids joined at the centromere.

4. In Model 1, how many replicated chromosomes does the cell contain during prophase?
- The cell contains 4 replicated chromosomes during prophase.