Mitosis and Meiosis

It's Just a Phase

100

Homologous chromosomes separate to opposite poles of the cell by spindle fibers attached to the kinetochore of the centromere.

Anaphase I

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

300

Homologous chromosomes independently assort along the middle of the cell while attached to spindle fibers

Metaphase I

400

The step after which division suspends until fertilization in female gametes

Telophase I (e.g. after meiosis I)

500

Sister chromatids are separated by contraction of spindle fibers attached to kinetochore of centromere.

Anaphase II

C and N?

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

200

4c, 2n

Prophase I

300

(2 chromosomes, n) + (2 chromosomes, n)

Anaphase I, Telophase I

400

(c, n + c, n); (c, n + c, n)

Anaphase II, Telophase II

500

(2c, n) + (2c, n)

Prophase II, metaphase II

It's Just a Phase 2

100

Sister chromatids decondense, nuclear envelope reforms, spindles disappear

Telophase II

200

Sister chromatids align along equator of cell and attach to spindle fiber

Metaphase II

300

Sister chromatids condense, nuclear membrane degrades, spindles start forming

Prophase II

400

The stage at which recombination occurs

Metaphase I

500

The stage that yields two haploid cells

Telophase I

Vocabulary

100

A cell with one chromosome from the father and one from the mother

Diploidy

200

Part of the chromosome that links two sister chromatids.

Centromere

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

400

Protein structure on chromatids in the centromere where the spindle fibers attach during cell division and meiosis to pull sister chromatids apart.

Kinetochore

500

One copy of a duplicated chromosome, which is joined to its other copy by a centromere

Chromatid

Mitosis or Meiosis I or II?

100

Crossing over occurs

Meiosis

200

Produces 4 distinct cells that are not genetically identical

Meiosis

300

Produces 2 genetically identical cells

Mitosis

400

No DNA replication occurs

Meiosis II

500

DNA replication occurs, but after the split it yields 2 haploid cells

Meiosis I