Suggested terminology for Keystone Review
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| allele | A variation of a gene's nucleotide sequence (an alternative form of a gene). A typical allele is represented by a capital letter (dominant) or a lower case letter (recessive).
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| allele frequency | The measure of the relative frequency of an allele at a genetic locus in a population; expressed as a proportion or percentage. A change in allele frequency indicates that evolution has taken place.
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| cell cycle | The series of events that take place in a cell leading to its division and duplication. The main phases of the cell cycle are interphase, nuclear division (prophase, metaphase, anaphase, and telophase) and cytokinesis.
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| chromosomal mutations | A change in the structure of a chromosome (ex: deletion, the loss of a segment of a chromosome and thus the loss of a segment containing genes; duplication, when a segment of a chromosome is duplicated and thus displayed more than once on a chromosome; i
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| chromosomes | A single piece of coiled DNA and associated proteins found in linear forms in the nucleus of eukaryotic cells and circular forms in the cytoplasm of prokaryotic cells; contains genes that encode traits. Each species has a characteristic number of chromoso
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| isolating mechanisms |
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