Genetics

Genetics

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Genetics

Trisomy

Biology; Genetics

Presence of an additional copy of a chromosome, so that there are three copies instead of the usual two. The most common trisomy is trisomy of chromosome 21, which causes Down syndrome.

Transposable element

Biology; Genetics

A class of DNA sequences that can move from one chromosomal site to another.

Transgenic

Biology; Genetics

An experimentally produced organism in which DNA has been artificially introduced and incorporated into the organism's germ line.

Transcriptome

Biology; Genetics

The total set of different RNA molecules transcribed from the genome in a particular cell, tissue or organism at a given time.

cataract

Biology; Genetics

An impairment of vision caused by the lenses of the eyes becoming cloudy. Cataracts are common in elderly people. They may be inherited or caused by diabetes and environmental factors.

chronic disease

Biology; Genetics

An illness that lasts for a long period of time or indefinitely. In contrast, an acute disease is one with a rapid onset and a short but usually severe course.