How does the organization of the bacterial genome differ from the organization of the eukaryotic genome?

The division of a bacterial cell occurs as the:

If a cell contained a mutation in the gene that encodes FtsZ, what process would be affected?

The point of constriction on chromosomes that contains certain repeated DNA sequences that bind specific proteins is called:

The number of chromosomes characteristic of diploid eukaryotic cells, in general

In later chapters, you will learn more about the regulation of gene expression. One way to regulate gene expression is to make changes to the histone proteins to alter how tightly the DNA is coiled and wrapped. The more tightly coiled and wrapped a particular region of DNA is, the less likely it is that the genes in that region will be expressed. Bearing this in mind, how tightly do you think regions of heterochromatin are compacted?

A scientist wants to study histones. Histones are:

Before cell division of somatic cells, each chromosome must be replicated. After replication, the resulting two parts of each chromosome are held together by cohesin at the centromere. These two parts are referred to as:

A cell biologist produces a karyotype of mouse somatic cells arrested in mitosis. She sees 40 chromosomes, which is completely normal for mice. Based on this information, what is the haploid number of chromosomes for mice?

What is the sequence of events in a typical eukaryotic cell cycle?

The portion of the cell cycle when the cell is growing and does not contain a replicated genome is referred to as:

The stage of the cell cycle during which the cytoplasm divides to form two cells is called

A duplicate copy of all of the hereditary information contained in the nucleus of eukaryotic cells is made during what stage of the cell cycle?

The physical distribution of cytoplasmic material into the two daughter cells in plant cells is referred to as:

Embryonic cell cycles allow the rapid division of cells in the early embryo. These mitotic cell cycles are much shorter in length than the mitotic cell cycles of cells in a mature organism. In the embryonic cell cycles, mitosis takes approximately the same amount of time as it does in the cell cycles of mature cells. What do you think is a result of the embryonic cycle?

What is the portion of the cell cycle during which the chromosomes are invisible under the light microscope because they are not yet condensed?

During what stages of the cell cycle are sister chromatids bound together by cohesin

Following S phase, a human cell would have how many pairs of sister chromatids and individual DNA molecules?

If a chromosome contains a mutation such that it cannot bind to the kinetochore complex, what would be the consequence?

This is the stage of mitosis characterized by the alignment of the chromosomes in a ring along the inner circumference of the cell:

This stage of mitosis is characterized by the disassembly of spindle apparatus, the reestablishment of the nuclear membrane, and the decondensation of the chromosomes:

In prophase, ribosomal RNA synthesis stops when the chromosomes condense, and as a result:

What happens during Anaphase B?

What stage of mitosis is essentially the reverse of prophase

Why is it so important that all of the chromosomes align on the metaphase plate during metaphase?

If a cell was capable of bypassing metaphase and going directly from prometaphase to anaphase, what is the most likely consequence of this?

If a drug that inhibited transport from the trans face of the Golgi was applied to plant cells, which stage of the cell cycle would be directly affected?

You are examining the effect of maturation-promoting factor (MPF) in sea urchin cells, which have a diploid number of 36. If you fuse a dividing sea urchin cell with a G1 arrested oocyte, what would be the outcome?

You are studying cell cycle progression in yeast cells. If you could prevent cdc2 from associating with the mitotic cyclin, the cells would:

You are studying cell cycle progression in yeast cells. If you could prevent cdc2 from associating with the mitotic cyclin, the cells would:

______ is a process of nuclear division which reduces the number of chromosomes per cell from 2 sets to 1 set.

In life cycles that alternate between haploid and diploid stages, fertilization doubles the number of chromosomes per cell while ______ reduces it in half.

Compared to asexual reproduction, the main advantage of sexual reproduction is that it

Evidence of crossing over can often be seen under the light microscope as a structure called a _______.

The cell produced by the fusion of an egg and a sperm is the

Which of the following produces new cells that are genetically identical to the original cell?

Which of the following events occurs first during meiosis?

Crossing over between homologous chromosomes takes place during

At the end of meiosis II, each of the four resulting cells contains

In plants and animals, the zygote develops by which of the following processes?

Which best explains the process of meiosis?

During meiosis, sister chromatids are held together by

What immediately follows meiosis I?

All of the following increase genetic variation EXCEPT

During anaphase I, which best represents segregation of the chromatids that make up one pair of homologues? (M represents a maternal chromatid and P represents a paternal chromatid. Assume no crossing over occurs.)

You are studying meiosis in an organism where 2n=24. How many chromosomes will each nucleus have after meiosis II is complete?

The Rec8 protein holds sister chromatids together during meiosis. If an individual has a mutation that prevents degradation of Rec8, this would most likely prevent

Which of the following is likely to occur if you were to prevent cyclin B from associating with its cyclin-dependent kinase near the end of meiosis I?

Which of the following statements about crossing over is false?

A life cycle that regularly alternates between haploid and diploid stages is found in all of the following EXCEPT

Why does sexual reproduction require both meiosis and syngamy?

The most common form of gene therapy involves inserting a normal gene into cells that contain a defective version of the gene. In order to use gene therapy to prevent a man from passing a defective gene on to future generations, you should try to insert normal copies of the gene into

Nondisjunction is the failure of homologous chromosomes to separate during meiosis I, or the failure of sister chromatids to separate during meiosis II or mitosis. As a result, both homologous chromosomes or both sister chromatids migrate to the same pole of the cell. This produces daughter cells with an imbalance of chromosomes. A cell biologist examines the final products of meiosis in an earthworm (2n=36) and finds 2 cells with 20 chromosomes, and 2 cells with 16 chromosomes. Most likely this was because

In meiosis, sister kinetochores are attached to the same pole of the cell during meiosis I, and sister chromatid cohesion is released during anaphase II. What would be the likely result if sister kinetochores were attached to different poles of the cell during meiosis I and sister chromatid cohesion was released during anaphase I?