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Cell Division Vocab
N/A
24
Biology
9th Grade
03/18/2013

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Term
Somatic cell
Definition
all body cells besides germ cells and gametes. produces identical cells in mitosis.
Term
Germ cells
Definition
special cells used for reproduction. produces gamete through meiosis
Term
Gamete
Zygote
Definition
reproductive cell (sperm and egg).
Term
Asexual reproduction
Definition
primitive form of reproduction, offspring is identical to parent
Term
Sexual reproduction
Definition
reproduction where offspring are genetically different from parents
Term
DNA
Definition
stores genetic information in gene form
Term
Histone
Definition
protein that wraps DNA into a chromosome
Term
Chromatin
Definition
DNA and the proteins it associates with, forms into a chromosome
Term
Chromosome
Definition
structure that is made when DNA is completely packaged
Term
Chromatid
Definition
one of two strands of a chromosome that has been replicated.
Term
Centromere
Definition
region of the replicated chromosome that hold the two chromatids together
Term
Autosomes
Definition
chromosomes that DON'T determine the sex of an individual (2 pairs of autosomes = 22 autosomes)
Term
Sex chromosomes
Definition
chromosomes that DO determine the sex of an individual (1 pair of autosomes = 2 autosomes)
Term
Diploid
Definition
cell that has 2 sets of chromosomes (one set from mom and one from dad; 23 sets each, 46 chromosomes: somatic cell)
Term
Haploid
Definition
cell that has one set of chromosomes (23 chromosomes, gametes)
Term
Cell Cycle
Definition
growth and division of cell life repeated again and again
Term
Interphase
Definition
time when DNA in each chromosome is copied
Term
Mitosis
Definition
process of cell division that occurs when the nucleus divides, creating 2 identical diploid cells
Term
Cytokinesis
Definition
division of cell's cytoplasm
Term
Cancer
Definition
disease that occurs when cell doesn't respond to checkpoints in cell cycle. uncontrolled growth and spread of cells
Term
Centrosome
Definition
organelle that produces the spindle during cell division
Term
Spindle
Definition
structure that binds to the chromosome and separates during cell division
Term
Homologous chromosomes
Definition
pair of chromosomes that carry the same genes (one chromosome from mom and other from dad)
Term
Meiosis
Definition
process of cell division when parent cell produces four haploid cells
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