Band, Q: A form of chromosome band, one of the bright and dull fluorescent bands seen alternating along the length of chromosomes under ultraviolet light after the chromosomes are stained with quinacrine.
The Q in Q band stands for Quinacrine, an agent used as an antimalarial agent and, in the laboratory, as a fluorescent dye.
- Banding of chromosomes
Banding of chromosomes: Treatment staining of chromosomes to reveal characteristic patterns of horizontal bands. Thanks to these banding patterns, which resemble bar codes, each human chromosome is distinctive and can be identified without ambiguity. Banding also permits the detection of chromosome deletions (lost segments), duplications (extra segments), and other structural abnormalities.
- Bannayan syndrome
Bannayan syndrome: A genetic disease characterized by macrocephaly (enlarged head), multiple lipomas (benign fatty tumors) and hemangiomas (benign blood vessel tumors). The macrocephaly occurs without enlargement of the cerebral ventricles. There is mild neurological impairment and postnatal growth retardation. Less frequent features associated with the syndrome may include antimongoloid (upslanting) palpebral fissures (eye slits), high-arched […]
- Bar chart
Bar chart: Proper term in mathematics for what is popularly called a bar graph. See: Bar graph.
- Bar graph
Bar graph: A visual display using bars to represent the relative size of different categories of a variable, with each category or value of the variable represented by a bar, usually with a gap between the bars. A bar graph is often used to illustrate the major features of the distribution of data because it […]
- Barber itch
Barber itch: A superficial fungal infection of the skin in the bearded area of the face and neck, with swellings and marked crusting, often with itching, sometimes causing the hair to break off. The name harks back to the days when men went to the barber daily for a shave. Also known as tinea barbae. […]