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Lecture test 3
dr. jen gordon college
9
Biology
Undergraduate 4
10/18/2011

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Term
Adaptation hypothesis
Definition
alteration or adjustment in structure or habit to compete with a changing environment
Term
Spontaneous Mutations
Definition
mutation occuring in the absence of mutagens, usually due to errors in teh normal function cellular enzymes
Term
Minimal medium
Definition
culture medium for microorganims that contains the minimal necessities for growth of the wild type, only containing inorganic salts, carbon source, and water
Term
Prototroph
Definition
a strain of organism that will proliferate on minimal medium
Term
episomes
Definition
A genetic element in bacteria that can replicate free in the cytoplasm (has a different number of copies) or can be inserted into the main bacterial chromosome and replicate with the chromosome. Plasmids are an example.
Term
fertility factor (F factor)
Definition
The plasmid that allows a prokaryote to conjugate with and pass DNA into an F- cell. A bacterial episome whose presence confers donor ability (maleness).
Term
autotroph
Definition
Organism that is able to utilize carbon dioxide as a carbon source.
Term
Genetic Recombination
Definition
The non-parental arrangement of alleles in progeny that can result from either independent assortment or crossing over.(2) In general, any process in a diploid or partially diploid cell that generates new gene or chromosomal combinations not found in that cell or in its progenitors.(3) At meiosis, the process that generates a haploid product of meiosis whose genotype is different from either of the two haploid genotypes that constituted the original meiotic diploid.
Term
Bacterial Conjugation
Definition
A process whereby two cells come in contact and exchange genetic material. In prokaryotes the transfer is a one-way process. The union of two bacterial cells, during which chromosomal material is transferred from the donor to the recipient cell. Conjugation in Protozoa is a two-way process, genetic material is passed between each conjugant.
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