Exam 9: The Links in Lifes Chain: Genetics and Cell Division

Match the following. A) metaphase B) telophase C) prophase D) cytokinesis E) anaphase -A contractile ring is narrowing along the cell's equator

During metaphase, chromosomes that are attached to microtubules are observed to undergo a "back-and-forth" movement. What is happening during this movement?

The ordering of bases in a gene determines the order of:

Some anticancer chemotherapy agents interfere with the proper functioning of microtubules. How do these anticancer chemotherapy agents work?

If a cell with 16 chromosomes undergoes mitosis, how many chromosomes will each daughter cell have?

Which statement is true of mitosis and cytokinesis in normal tissues?

Refer to the figure below, and then answer the question that follows. -What is the advantage of chromatin coiling and condensing into tight structures before mitosis?

A cell is observed under the microscope. What feature will indicate that it is in anaphase?

At several points in the cell cycle there are checkpoints that control the cell's passage from one phase to the next. If a cell receives a signal at each checkpoint, it continues to the next phase; if it does not receive the signal, the cell does not continue. For example, a growth factor may stimulate a cell to move from G₁ into S phase. If no growth factor is present, the cell cycle stops in G₁ and the cell does not divide. Predict what would happen to a cell and to a multicellular organism if there was a defect at the checkpoint and the cell continued through the cell cycle even in the absence of a signal.

Compact chromosomes first become visible during metaphase.

During the cell cycle of a eukaryotic cell, each chromosome is replicated to become a chromosome with two chromatids, and then the chromatids are pulled apart to form two separate chromosomes.

Which molecule is made in the nucleus but exits to function in the cytoplasm?

The ________ is a microtubule structure that binds to sister chromatids to separate them in anaphase.

Normal cell operations and growth occur during the "gap" period called:

What event typically begins in anaphase and is completed soon after the end of telophase?

Why do karyotypes always show chromosomes at the point when cell division is about to occur?

The order of bases in a gene is copied to make a/an:

Which of the following is the proper sequence of events in gene expression?

During which phase of mitosis are the chromosomes aligned along the equator of the cell? Predict what would happen if a cell completed mitosis without first lining up all the chromosomes in the middle of the cell.

At what point in the cell cycle does DNA replication take place?