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Cell Division and Mitosis Worksheet

Exercise 3

Part 3c. The G1 cell on your mat board presently contains a total of ______ chromosomes, each

of which is ______________ stranded. There are ______ pairs of homologous chromosomes in

the cell. Because chromosomes are in homologous pairs, G1 cells are ______________.

Part 4. Place the four replicated, double stranded chromosomes (strings) on the cell labeled G2

on your mat board. The G2 cell contains a total of ____ chromosomes that represent ____ pairs

of homologous chromosomes. Each chromosome in G2 consists of ____ strands called

______________________. Because chromosomes are present in ____________ pairs in G2

cells, cells are still _____________ or 2n. Notice that replication did not change the number of

_______________.

Exercise 4

Part 1d. Draw a cell in prophase as it appears on the mat board and label the chromosomes,

chromatids, and spindle fibers

Part 1e. Summary of prophase: During prophase _______________ become shorter and

thicker. The __________ and the ______________ envelope disappear. _________________

fibers, made of ____________________, form a football-shaped structure within the cell. Some

microtubules attach to the _______________ of the chromosomes. Because chromosomes are

present in homologous pairs during prophase, the cell is ______________ or ___n.

Part 2c. Draw a cell in metaphase as it appears on the mat board and label the chromosomes,

chromatids, and spindle fibers.

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Part 3c. Draw a cell in anaphase as it appears on the mat board and label the chromosomes and

spindle fibers.

Part 3d. Summary of metaphase and anaphase: Chromosomes line up single file on the equator

during ____________. During _____________ each chromosome splits at its _____________.

As a result of this split, identical sister chromatids separate and are now called ______________.

The new chromosomes move toward _______________________________, guided by

__________________.

Part 4c. Draw a cell in telophase as it appears on the mat board and label the chromosomes,

nuclear envelope, and daughter cells.

Exercise 5

Part 2. Summary of telophase: Telophase is the final phase of mitosis. During telophase the

___________ envelope reforms and the ________________ reappear within the nucleus.

Chromosomes elongate and, once again, are described as ____________________. By the end

of telophase the cytoplasm from the original cell usually divides to form daughter cells by a

process called __________________________.

Exercise 6

Part 1b. Sketch one plant cell in each phase of mitosis from the microscope slide.

Prophase Metaphase Anaphase Telophase