In order to fit within a cell, DNA becomes more compact by
wrapping tightly around associated proteins
Chromatids are
duplicate halves of a chromosome
A protein disk that attaches two chromatids to each other in a chromosome is called a
centromere
Eukaryotic chromosomes contain DNA, while prokaryotic chromosomes contain a different form of genetic material. True or False?
False
How many pairs do the chromosomes in your body exist in?
23 pairs
A student can study a karyotype to learn about the
number of chromosomes present in a body cell
A diploid cell is one that
has chromosomes found in pairs, is designated by the symbol 2n, and has two homologues of each cell.
Diploid: body cell as Haploid:
reproductive cell
The number of chromosomes in a human cell is 46. How many chromosomes are in a human egg cell?
23
How many chromosomes are in the body cells of an organism that has a haploid number of 8?
16
What is binary fission?
the process by which bacteria produce
The chromosome of a bacterium
has a circular shape
In the bacterium, cell division takes place when
the DNA is copied, a new cell membrane forms between the DNA copies, and the cell splits into two cells.
The stage of the cell that occupies the majority of the cell's life is
interphase.
What is the correct sequence of the cell cycle.
G1-S-G2-M-C
Growth: G1::
DNA copying: S
Metaphase: prophase::
G2: S
The phase of mitosis that is characterized by the arrangement of all chromosomes along the equator of the cell is called
metaphase
Anaphase
What is this picture describing?
A spindle fiber is
a specialized form of cilium
Telophase
What is this picture describing?
A typical human cell contains 46 chromosomes. After mitosis and cytokinesis, each of the two new cells formed from the original cell has
a complete set of 46 chromosomes.
As a result of mitosis, each of the new cells produced from the original cell during cytokinesis
receives an exact copy of all chromosomes present in the original cell.
During which stage do the centromeres divide?
Anaphase
Cell cycle::
mitosis
In plant cells, cytokinesis occurs when:
a new cell wall forms
Mitosis is a process by which
a cells nucleus divides
Cytokinesis differs in plant and animal cells. True or False?
True.
Separation of the homologues occurs during
meiosis 1
The difference between anaphase of mitosis and anaphase 1 of meiosis is that
chromatids do not separate at the centromere in anaphase 1
When crossing over takes place, chromosomes
exchange corresponding segments of DNA
The exchange of segments of DNA between the members of a pair of chromosomes
acts as a source of variation within a species.
Mitosis is a process by which
...
Chromatids are
duplicate halves of a chromosome.