Cell Cycle

Cell Cycle & Mitosis

Mitosis

​Mitosis

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​* Mitosis is the type of cell division that leads to growth or cell repair

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When the cell divides by mitosis:

• two new cells are formed​

• each cell is identical to the other one, and the cell they were formed from​

​MYP Science 9

Multiple Choice

At the end of mitosis, what develops around each set of chromosomes?

• cytoplasm

• DNA

• cell wall

• nuclear envelope

Multiple Choice

What is the end result of mitosis?

• Two new cells with identical sets of chromosomes

• Two new cells with different sets of chromosomes

• One cell with two identical sets of chromosomes

• One cell with two different sets of chromosomes

Match

Match the following

• Interphase

• Mitosis

• Cytokinesis

The cell is getting ready to divide. It grows in size and all DNA is replicated.

Chromatids align at the center, separate to opposite ends & prepare for division of cytoplasm.

Cytoplasm is pinched inward. Two daughter cells are formed and each identical to the original cell.

• The cell is getting ready to divide. It grows in size and all DNA is replicated.

• Chromatids align at the center, separate to opposite ends & prepare for division of cytoplasm.

• Cytoplasm is pinched inward. Two daughter cells are formed and each identical to the original cell.

Match

Match the following

• Prophase

• Metaphase

• Anaphase

• Telophase

DNA condenses into chromosomes, nuclear envelope disappears

Identical chromatids align at the center held together by a centromere

Centromeres divide; spindle fibers attach to them. Cell becomes elongated

Chromatids arrive at opposite poles. Nuclear envelope form; DNA loosens & expands

• DNA condenses into chromosomes, nuclear envelope disappears

• Identical chromatids align at the center held together by a centromere

• Centromeres divide; spindle fibers attach to them. Cell becomes elongated

• Chromatids arrive at opposite poles. Nuclear envelope form; DNA loosens & expands

Draw

Fill in the blanks. Use the word bank in your study guide

Cell Cycle & Mitosis

​The Cell Cycle is the series of events that cells go through as they grow and divide.

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During the Cell Cycle, a cell grows, prepares for division, and divides to form two daughter cells, each of which begins the cycle again​.

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Interphase is the period of growth that occurs between cell division

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Interphase​ is divided into three phases: G1, S, & G2

G1 Phase

​The G1 phase is a period of activity in which cells do most of their growing. Cells will increase in size and synthesize new proteins and organelles.

S Phase

​The S phase replicates chromosomes and synthesizes DNA molecules. When DNA replication is completed, the cell enters the G2 phase.

G2 Phase

​During the G2 phase, many of the organelles and molecules required for cell division are produced.

When G2 is completed, the cell is ready to enter the M phase.

​Mitosis are divided into four phases: prophase, metaphase, anaphase, & telophase

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Remember: P-M-A-T​

Draw

Fill in the blanks. Use the word bank in your study guide

Meiosis

​Some text here about the topic of discussion.

​MYP Science 9

​Activity

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​Reading Comprehension on Mitosis

Multiple Choice

What is the end result of mitosis?

• Two new cells with identical sets of chromosomes

• Two new cells with different sets of chromosomes

• One cell with two identical sets of chromosomes

• One cell with two different sets of chromosomes

Open Ended

What part of the cell cycle precedes mitosis?

Open Ended

The mitotic phase of the cell cycle is the combination of mitosis and what other process?

Open Ended

What is the name for the sets of identical copies of chromosomes?

Open Ended

In what type of cell does a cell wall develop during cytokinesis?

Multiple Choice

What condenses and attaches to fibers during mitosis?

• DNA

• centromeres

• pairs of chromosomes

• cytoplasmic membrane

Multiple Choice

What are tightly wound DNA molecules that contain important cell information called?

• centromeres

• chromosomes

• chromatids

• microtubules

Multiple Choice

Where do sister chromatids attach to each other?

• centromere

• spindle

• microtubules

• cytoplasm

Multiple Choice

What pulls apart the sister chromatids?

• centromeres

• microtubules

• cytoplasm

• DNA