micronucleus

/mahy-kroh-noo-klee-uhs, -nyoo-/US // ˌmaɪ kroʊˈnu kli əs, -ˈnyu- //UK // (ˌmaɪkrəʊˈnjuːklɪəs) //

微核,小核,微小核,微小核仁

Definitions

n.名词 noun

1
plural mi·cro·nu·cle·i [mahy-kroh-noo-klee-ahy, -nyoo-]. /ˌmaɪ kroʊˈnu kliˌaɪ, -ˈnyu-/. Biology.
- : the smaller of the two types of nuclei occurring in ciliate protozoans.

As noted, in fission the meganucleus divides by direct constriction; each micronucleus by a mode of mitosis.
The macronucleus is usually dorsal, elliptical, and cleft, with one micronucleus attached.
The macronucleus is spheroidal and placed near the center of the body; a conspicuous micronucleus lies near it.
The macronucleus is central, spherical in form, and bears a single minute micronucleus.
The macronucleus is spherical, centrally placed, and with one micronucleus closely applied.