(invertebrate zoology) In ciliated protozoas, the occurrence of two types of nuclei in a cell, each with different genetic functions.
Nuclear dimorphism
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(¦nü·klē·ər dī′mör′fiz·əm)
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Nuclear dimorphism is a term referred to the special characteristic of having two different kinds of nuclei in a cell. This feature is observed in protozoa ciliates and some foraminifera. Ciliates contain two nucleus types: a macronucleus that is primarily used to control metabolism, and a micronucleus which performs reproductive functions and generates the macronucleus. Nuclear dimorphism is subject to complex epigenetic controls.
See also
Epigenetic controls in ciliates.
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