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gene mapping

the creation of a schematic representation of the arrangement of genes, genetic markers, or both as they occur in the genetic material of an organism. For humans and other higher organisms, three different types of map are made. A genetic map (or linkage map) shows the relative positions of genes along each chromosome. A physical map shows the absolute physical distances between genes along the DNA molecule. A cytogenetic map depicts the banded appearance of stained chromosomes; the bands can be correlated with the location of particular genes.

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Psychology term of the day

May 25th 2024




1. the practice of taking committed action to achieve an end, particularly as it relates to a political or social goal. See also community action group; social action program.

2. in philosophy, the doctrine that any relationship between thought and reality is characterized by continuous activity on the part of the mind, rather than passive receptivity. —activist adj., n.