karyokinesis

/,kæriouki'ni:sis/

Thân thiện

A student observes karyokinesis under a microscope in the biology lab.

Definition

1. Noun:
   • The process of nuclear division in a cell: "karyokinesis" specifically refers to the series of events during which the nucleus of a eukaryotic cell divides, typically involving the condensation of chromosomes, their alignment, and their separation into two distinct daughter nuclei. This process is a key phase within cell division (mitosis or meiosis), distinct from the subsequent division of the cytoplasm (cytokinesis).

Usage Examples

• Noun:
  • Karyokinesis is a crucial stage preceding cytokinesis in cell division.
  • During mitosis, karyokinesis ensures that each daughter cell receives an identical set of chromosomes.
  • The biologist observed the distinct phases of karyokinesis under the microscope.

Advanced Usage

• Technical Distinction: In cell biology, "karyokinesis" is often explicitly contrasted with "cytokinesis." The former deals with nuclear division, while the latter deals with cytoplasmic division.
  • The experiment aimed to inhibit karyokinesis without affecting cytokinesis.

Variants and Related Words

• Karyokinetic (adj): Pertaining to or involving karyokinesis.
  • The karyokinetic spindle apparatus is essential for chromosome movement.

Synonyms

• Nuclear division: The general process of the nucleus dividing.
• Mitotic nuclear division: When referring specifically to the nuclear division phase of mitosis.

Antonyms

• Cytokinesis: The division of the cell cytoplasm following nuclear division.
• Interphase: The phase of the cell cycle where the nucleus is not dividing.

Học thuật

Noun

1. organic process consisting of the division of the nucleus of a cell during mitosis or meiosis