Chapter 10 Mitosis
Cytokinesis in plant cells occurs via the formation of a(n):
Cell Plate
Chromosomes are duplicated during the ____ of the cell cycle.
S Phase
Cytokinesis in animal cells involves contraction of a ring of ____ microfilaments.
actin plus myosin
Homologous chromosomes can be identified and/or characterized by:
their similar and characteristic staining patterns.
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
In the accompanying figure, which combination of letters accurately represents two homologous chromosomes?
A and D
During prophase, ____ is(are) compacted into visible chromosomes.
Chromatin
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 unwound chromatin, nucleosomes are organized into large coiled loops held together by:
Scaffolding Proteins
A cell is dividing by binary fission. What can you conclude?
The cell is prokaryotic.
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.
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