Chapter 10 Test

Which of the following is produced by meiosis?

animal gametes

Duplicated centrioles move to opposite poles of a dividing ____ cell during the ____ of the cell cycle.

animal; prophase

The cell cycle of a typical somatic cell consists of the ____ and M phases.

interphase

Gametophyte plants produce gametes using:

mitosis

The ____ is responsible for the separation of the chromosomes during the ____ of mitosis.

mitotic spindle; anaphase

In a prometaphase cell, the:

nucleolus disappears

At the completion of oogenesis, ____ are produced.

one egg cell and three polar bodies

____ contain identical DNA sequences and are held together by ____ during mitosis.

Sister chromatids; cohesin proteins

A cell is dividing by binary fission. What can you conclude?

The cell is prokaryotic

An animal with a diploid number of 36 chromosomes will have ____ chromosomes in its gametes and ____ chromosomes in its somatic cells.

18, 36

In a human cell at prophase I, there are ____ tetrads.

23

Chromosomes are duplicated during the ____ of the cell cycle.

S phase

When is a cell in metaphase?

The chromosomes are aligned at the midplane of the cell

To prevent disastrous consequences, the eukaryotic cell cycle is controlled by:

a series of cell cycle checkpoints

During prophase I, each chiasma represents:

a site of crossing over

Cytokinesis in animal cells involves contraction of a ring of ____ microfilaments.

actin plus myosin

Cytokinesis in plant cells occurs via the formation of a(n):

cell plate

During prophase, ____ is(are) compacted into visible chromosomes.

chromatin

Eukaryotic chromosomes are composed of:

chromatin

Which event occurs in prophase II?

condensation of the chromatin into chromosomes

To control the cell cycle:

cyclins fluctuate during the cell cycle

Plant hormones known as ____ stimulate mitosis.

cytokinins

Nucleosomes are best described as:

eukaryotic DNA associated with histone proteins

____ organized on chromosomes carry the information that controls the functions of the cell.

genes

A cell in the G2 phase:

has twice the amount of DNA present in a telophase nucleus

The function of nucleosomes is to:

prevent DNA strands from tangling

In unwound chromatin, nucleosomes are organized into large coiled loops held together by:

scaffolding proteins

Homologous chromosomes can be identified and/or characterized by:

their similar and characteristic staining patterns