Final Answer:
1. 1 = cell membrane, 2 = nucleus, 3 = nucleolus (inside nucleus), 4 = cytoplasm
2. 4 chromosomes (each with 2 sister chromatids)
3. Chromosomes have condensed and become visible; each chromosome now consists of two identical sister chromatids joined at the centromere
4. The mitotic spindle (made of microtubules) has formed and begins attaching to chromosomes
5. The nucleus has disappeared (nuclear envelope has broken down)
6. Chromosomes have lined up single-file along the center (equator) of the cell — the metaphase plate
7. Sister chromatids have separated and are being pulled toward opposite poles of the cell
8. Chromosomes have reached the opposite poles; nuclear envelopes begin to reform around each set; spindle breaks down
9. Each daughter cell has the same number of chromosomes as the original interphase cell (4 chromosomes), and each is genetically identical to the original cell
Parent Tip: Review the logic above to help your child master the concept of cell cycle worksheet answer key.
