It's Just a Phase
C and N?
It's Just a Phase 2
Vocabulary
Mitosis or Meiosis I or II?
100
Homologous chromosomes separate to opposite poles of the cell by spindle fibers attached to the kinetochore of the centromere.
Anaphase I
100
How many sets of chromosomes are in the final product(s) of meiosis I and II? What ploidy is it?
1 set of chromosomes, haploidy
100
Sister chromatids decondense, nuclear envelope reforms, spindles disappear
Telophase II
100
A cell with one chromosome from the father and one from the mother
Diploidy
100
Crossing over occurs
Meiosis
200
Homologous chromosomes condense and form a tetrad (e.g. cross over) while the nuclear envelope degrades and centrioles start to form spindle fibers and move to poles of cell.
Prophase I
200
4c, 2n
Prophase I
200
Sister chromatids align along equator of cell and attach to spindle fiber
Metaphase II
200
Part of the chromosome that links two sister chromatids.
Centromere
200
Produces 4 distinct cells that are not genetically identical
Meiosis
300
Homologous chromosomes independently assort along the middle of the cell while attached to spindle fibers
Metaphase I
300
(2 chromosomes, n) + (2 chromosomes, n)
Anaphase I, Telophase I
300
Sister chromatids condense, nuclear membrane degrades, spindles start forming
Prophase II
300
Chromosomes that code for the same genes, but may have different alleles. A person gets one from their mother and another from their father.
Homologous chromosomes
300
Produces 2 genetically identical cells
Mitosis
400
The step after which division suspends until fertilization in female gametes
Telophase I (e.g. after meiosis I)
400
(c, n + c, n); (c, n + c, n)
Anaphase II, Telophase II
400
The stage at which recombination occurs
Metaphase I
400
Protein structure on chromatids in the centromere where the spindle fibers attach during cell division and meiosis to pull sister chromatids apart.
Kinetochore
400
No DNA replication occurs
Meiosis II
500
Sister chromatids are separated by contraction of spindle fibers attached to kinetochore of centromere.
Anaphase II
500
(2c, n) + (2c, n)
Prophase II, metaphase II
500
The stage that yields two haploid cells
Telophase I
500
One copy of a duplicated chromosome, which is joined to its other copy by a centromere
Chromatid
500
DNA replication occurs, but after the split it yields 2 haploid cells
Meiosis I
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