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at Related Biological Terms:

agitator

a device that stirs solutions.

AIDS-related complex

A condition in which antibody tests for AIDS virus are positive and patients may exhibit enlarged lymph nodes, fatigue, fever, night sweats, weight loss, and unexplained diarrhea, but do not have any of the more serious complications of AIDS.

alcoholic fermentation

An anaerobic step that yeast use after glycolysis that breaks down pyruvic acid to ethanol and carbon dioxide.

alkaline phosphatase

An enzyme found mainly in liver and bone. Blood serum alkaline phosphatase is usually measured to detect liver or bone disease.

alkylating agent

A chemical agent that can add alkyl groups (for example, ethyl or methyl groups) to another molecule; many mutagens act through alkylation.

allele specific hybridization

Usually refering to when probes anneal specifically to a certain allele.

allergy mediator

Biochemical, such as histamine and heparin, that mast cells release when contacting an allergen, causing allergy symptoms.

allopatric speciation

speciation in which the evolution of reproductive isolating mechanisms occurs during physical separation of the populations.

alternate segregation

At meiosis in a reciprocal translocation heterozygote, the passage ( segregation) of both normal chromosomes to one pole and both translocated chromosomes to the other pole, giving genetically balanced gametes. Segregation of centromeres during meiosis in a reciprocal translocation heterozygote such that genetically balanced gametes are produced.

alternation of generations

The alternation of gametophyte and sporophyte stages in the life cycle of a plant.

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