16 terms

Mitosis and Meiosis

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Chromosome
Coiled up DNA
Centromere
Centre of chromosome. Joins it to spindle fibre.
Chromatid
One half of a replicated chromosome
Diploid
2n = number of chromosomes in body cells. humans = 46
Haploid
n = number of chromosomes in gametes (sperm and eggs)
humans = 23
Function of Mitosis
Cell division for growth, repair or maintenance.
Function of Meiosis
Cell division for gamete production (sperm and eggs).
Phases of the Cell Cycle
1. Interphase (G1, S, G2)
2. Mitosis (PMAT)
3. Cytokinesis (cell division)
Events in Metaphase
Chromosomes line up at the metaphase plate.
MIDDLE
Anaphase
APART! Centromeres divide.
Telophase
the final phase of cell division, between anaphase and interphase, in which the chromatids or chromosomes move to opposite ends of the cell and two nuclei are formed.
Cytokinesis
Cell divides into two. Cell plate forms in plant cells.
Sexual Reproduction
Requires male and female gametes. Variation.
Asexual Reproduction
One parent only. (cloning)
Mitosis.
Gametes
Sperm or eggs.
Created by meiosis.
Haploid (n)
Anaphase II
Centromeres split. Single chromosomes move apart.
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