Explanation:
This diagram shows the stages of
mitosis — the process a eukaryotic cell uses to divide its nucleus and split its duplicated chromosomes equally between two daughter cells.
Let’s go step by step through each numbered stage:
1.
Stage 1: The cell is in
interphase (specifically, late interphase/G2 phase). The nucleus is intact, DNA is duplicated but still in loose chromatin form (not visible as distinct chromosomes), and the centrosome (the small cylinder) has duplicated and moved near the nucleus. This is *before* mitosis starts.
2.
Stage 2: Mitosis begins with
prophase. Chromosomes condense into visible X-shaped structures (each made of two sister chromatids). The nuclear envelope breaks down (dashed circle = former nucleus), and spindle fibers begin forming from the centrosomes (now at opposite poles, shown as star-like structures).
3.
Stage 3: This is
metaphase. Chromosomes line up single-file along the equator (middle) of the cell. Spindle fibers from both poles attach to the kinetochores of each chromosome. The alignment is precise — this ensures equal distribution.
4.
Stage 4: This is
anaphase. Sister chromatids separate and are pulled toward opposite poles by shortening spindle fibers. Each separated chromatid is now considered an individual chromosome. You can see the V-shaped chromosomes moving apart.
5.
Stage 5: This is
telophase (and cytokinesis begins). Two new nuclei form around the separated chromosome sets (dashed circles = new nuclear envelopes). The cell pinches in two (cleavage furrow in animal cells), resulting in two genetically identical daughter cells. The centrosomes are now in each daughter cell.
So the correct labels for the stages are:
1. Interphase
2. Prophase
3. Metaphase
4. Anaphase
5. Telophase (and cytokinesis)
Final Answer:
1. Interphase
2. Prophase
3. Metaphase
4. Anaphase
5. Telophase
Parent Tip: Review the logic above to help your child master the concept of meiosis coloring worksheet.
