The first gap, or growth phase, of the cell cycle, consisting of the portion of interphase before DNA synthesis begins.
Describe Telophase
The fifth and final stage of mitosis, in which daughter nuclei are forming and cytokinesis has typically begun.
In which part of the cell cycle is the DNA duplicated?
S phase
Descrcibe Prometaphase
The second stage of mitosis, in which the nuclear envelope fragments and the spindle microtubules attach to the kinetochores of the chromosomes.
Describe Prophase
The first stage of mitosis, in which the chromatin condenses into discrete chromosomes visible with a light microscope, the mitotic spindle begins to form, and
State phases of Meiosis in sequence.
Prophase I, Prometaphase I, Metaphase I, Anaphase I, Telophase I, Interphase, Prophase II, Prometaphase II, Metaphase II, Anaphase II, Telophase II
Describe Metaphase
The third stage of mitosis, in which the spindle is complete and the chromosomes, attached to microtubules at their kinetochores, are all aligned at the metapha
Occurs in somatic cells
Mitosis
hapoid cells have ___ chromosomes
n
At the end of mitosis, there are ____ cells that are genetically __________.
2, identical
Describe Anaphase
The fourth stage of mitosis, in which the chromatids of each chromosome have separated and the daughter chromosomes are moving to the poles of the cell.
Daughter cells are diploid
Mitosis
What is the name of the region of a chromosome to which the microtubules of the spindle attach, via the kinetochore, during cell division.
centromere
2n =
diploid
A male with Down's syndrome has __________ chromosomes.
47
Occurs in gametes
Meiosis
Daughter cells are haploid
Meiosis
uncontrolled cell growth leads to _______
Cancer
Chromosomes that are similar in size, shape, and genetic content are called _____________ chromosomes
homologous
Describe the S phase of cell division
The synthesis phase of the cell cycle; the portion of interphase during which DNA is replicated.
Around what percent of the cell cycle does interphase take up?
~90%
Which process performs "PMAT" twice?
Meiosis
At the end of meiosis, there are ________ cells that are genetically ____________.
4, unique
Human sperm contain ___________ chromosomes
23
The point where chromatids cross over is called _____________.
Chiasma
Meiosis two is esentially the same steps as ____________.
mitosis
Describe the G2 phase of cell division
The second gap, or growth phase, of the cell cycle, consisting of the portion of interphase after DNA synthesis occurs.
Results in the replication of two identical daughter cells
Mitosis
When does crossing over occur?
Prophase I of meiosis
Creates new cells to replace old, damaged cells
Mitosis
Define Interphase
Any phase that isn't mitosis (G1, S, G2)
Experiences crossing over
Meiosis
Does not experience crossing over
Mitosis
Each side of a duplicated chromosome is known as a _____________ chromatid.
sister
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