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Mitosis - Meiosis
Question | Answer |
---|---|
Part of the cell cycle when the cell performs it function. It includes the stages G1, S, and G2. | Interphase |
Part of the cell cycle where the cell prepares for division. Produces 2 identical diploid cells. | Mitosis |
Part of the cell cycle when the cytoplasm divides forming daughter cells. | Cytokinesis |
Part of Interphase when the cell grows BEFORE the DNA is copied. | G1 |
Part of Interphase when the DNA is copied. | S-phase |
Part of Interphase when the cell grows AFTER the DNA is copied. | G2 |
What are the 4 phases of Mitosis in order? | Prophase, Metaphase, Anaphase, Telophase |
1st stage of mitosis; the nuclear envelope disappears and chromosomes condense. | Prophase |
2nd stage of mitosis; sister chromatids line-up down the equator (in the middle). | Metaphase |
3rd stage of mitosis; sister chromatids are separated apart. | Anaphase |
4th stage of mitosis; the nuclear envelope reforms and the cell begins to divide. | Telophase |
Part of the cytoskeleton that aids in cell division. | Centrioles |
DNA in its condensed form. | Chromosomes |
A chromosome and its copy (makes an "X" shape). | Sister Chromatids |
String-like structures coming from the centrioles that attach to the chromosomes to pull them apart. | Spindle fibers |
Sister chromatids are attached at the ________________. This is also where spindle fibers attach. | Centromere/kinetochore |
In plant cells, this is the beginning of a new cell wall. | Cell plate |
Cells with two sets of chromosomes (2n). One set from mom, one set from dad. | Diploid |
Cells with half the number of normal chromosomes or one set of chromosomes (n). | Haploid |
What kind of cells go through mitosis? | Somatic cells (body cells) |
What kind of cells go through meiosis? | Gametes (sex cells) |
Name of the male gamete that's produced in the testes. | sperm |
Name of the female gamete that's produced in the ovaries. | ovum (egg) |
During fertilization, the sperm and the egg fuse together to form a _______________. | Zygote |
The process that produces gametes. It creates 4 haploid cells that are NOT identical. | Meiosis |
Meiosis in males is called | Spermatogenesis |
Meiosis in females is called | Oogenesis |
Number of sperm produced in spermatogenesis. | 4 |
Number of cells produced in oogenesis. | 4 (3 polar bodies that die, 1 egg that lives). |
Pair of chromosomes that are similar in shape and size. | Homologous chromosomes |
Homologous chromosomes are made up of 2 _________________. | Homologs (one from each parent) |
Phase of meiosis when synapsis and crossing over occurs. | Prophase I |
The process of synapsis forms _________________, where homologous chromosomes come together. | tetrads |
Phase of meiosis where the homologous chromosomes align down the equator (middle). Also where Independent Assortment occurs. | Metaphase I |
Part of Prophase I where chromosomes exchange DNA to create diversity in the offspring. | Crossing over |
Part of Metaphase I where homologous chromosomes line up at random to create diversity in the offspring. | Independent Assortment |
Phase of meiosis where homologous chromosomes are separated. | Anaphase I |
Phase of meiosis where one cells begins to divide into two cells. | Telophase I |
Phase of meiosis where the nuclear envelope disappears and chromosomes condense (occurs in 2 cells). | Prophase II |
Phase of meiosis where chromosomes align down the equator (middle), NOT in pairs. | Metaphase II |
Phase of meiosis where sister chromatids are separated apart. | Anaphase II |
Phase of meiosis where two cells each begin to divide into 2 daughter cells for a total of 4 cells. | Telophase II |
Diploid (2n) number in humans. | 46 chromosomes (2 sets of 23, one set from mom, one set from dad). |
Haploid (n) number in humans. | 23 chromosomes (each parent will pass on 23 chromosomes to the offspring). |