Exam 11: The Cell Cycle and Cell Division

Refer to the figure showing nuclei of somatic cells of a diploid organism with varying chromosomal makeup. Which image best represents the chromosomal makeup of the nucleus of a parent cell in G1? Explain your answer.

After the centromeres separate during mitosis, the chromatids, now called _______, move toward opposite poles of the spindle.

Refer to the figure showing cyclin binding to Cdk. At what step does allosteric regulation occur?

One difference between mitosis and meiosis I is that

During meiosis, the sister chromatids separate during

In meiosis II,

You examine a population of dividing cells with an electron microscope, and you see a large, floppy, circular string near the center of the cell that seems to be tangled with another floppy circular string.Deducing that the strings are the replicating DNA of the cell, you determine that the cell is a prokaryote and is undergoing _______.

Which event does not occur during mitotic prometaphase?

The structures that line up the chromatids on the equatorial plate during metaphase are called

Predict the effect of a mutation that makes histone proteins negatively charged.

In meiosis, DNA replicates _______ the nucleus divides.

Which condition is a form of cell death?

Mutations in a gene called neu reduce the expression of the gene and can lead to cancer.Thus, neu is likely a(n) _______ gene.

Which statement about mitosis is true?

Imagine that there is a mutation in the Cdk gene such that its gene product is nonfunctional.What effect will this mutation have on a mature red blood cell?

Which statement about independent assortment is false?

Refer to the figure showing nuclei of somatic cells of a diploid organism with varying chromosomal makeup. Image _______ best represents the chromosomal makeup of a daughter cell in prophase II of meiosis.

In a cell in mitotic metaphase, there are 40 sister chromatids.How many centromeres are there in the cell?

In a particular diploid organism, somatic cells have 24 chromosomes.How many chromosomes would be present in the gametes of that organism?

A tissue in a mouse contains two types of cells: one that divides rapidly and one that divides more slowly.The most likely difference between these two cell types is that the slow-dividing cell type spends more time in _______ phase.