Question

cell division
understanding main ideas
fill in the blanks in the table below. then answer the questions that follow in the spaces provided.
phases of mitosis

phase	event
2. metaphase	chromosomes attach to spindle fibers
anaphase	3. ____________
4. telophase	new nuclear envelope forms

Explanation:

To solve the fill - in - the - blanks for the phases of mitosis, we recall the key events of each phase:

Step 1: Prophase Event

In prophase, the chromatin condenses into visible chromosomes, the nuclear envelope breaks down, and the spindle apparatus begins to form. So the event for prophase is "Chromatin condenses into chromosomes; nuclear envelope breaks down; spindle apparatus forms".

Step 2: Phase with Chromosomes Attaching to Spindle Fibers

The phase where chromosomes attach to spindle fibers is metaphase. In metaphase, the chromosomes line up at the equatorial plate (metaphase plate) of the cell, and each chromosome is attached to spindle fibers at its centromere.

Step 3: Anaphase Event

During anaphase, the sister chromatids (which are attached at the centromere) separate and are pulled to opposite poles of the cell by the spindle fibers. So the event for anaphase is "Sister chromatids separate and move to opposite poles of the cell".

Step 4: Phase with New Nuclear Envelope Formation

The phase where a new nuclear envelope forms is telophase. In telophase, the chromosomes reach the opposite poles, start to de - condense back into chromatin, and a new nuclear envelope forms around each set of chromosomes.

Filled - in Table

Phase	Event
Metaphase	Chromosomes attach to spindle fibers
Anaphase	Sister chromatids separate and move to opposite poles of the cell
Telophase	New nuclear envelope forms

Answer:

s for Each Blank

1. For Prophase: Chromatin condenses into chromosomes; nuclear envelope breaks down; spindle apparatus forms
2. For the second blank (phase): Metaphase
3. For Anaphase: Sister chromatids separate and move to opposite poles of the cell
4. For the fourth blank (phase): Telophase