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