Dictionary > Interkinesis


Interphase II, i.e. a short resting period occurring between meiosis I and meiosis II
Meiosis is a specialized form of cell division that ultimately gives rise to non-identical sex cells. There are two successive nuclear divisions: meiosis I and meiosis II. Each of them has four major phases. These are prophase, metaphase, anaphase and telophase. Each of these phases is designated as I or II depending where it occurs, i.e. in meiosis I or in meiosis II. In both nuclear divisions (i.e. meiosis I and meiosis II), cytokinesis occurs. Cytokinesis is the division of the cytoplasm and the plasma membrane following the division of the nucleus resulting into two cells, each having its own nucleus and cytoplasm surrounded by a plasma membrane. After the first cytokinesis, there may be a short period of rest before the new cell proceeds to meiosis II. This resting period is called interkinesis or interphase II. It is called interphase II because the first interphase (i.e. interphase I) takes place before the cell enters meiosis I. It is in interphase I that the cell replicates its DNA. No DNA replication occurs in interphase II. Nevertheless, proteins and RNAs are synthesized before the cell proceeds to meiosis II. The spindle in meiosis I disassembles and the microtubules reassemble giving rise to new spindles for meiosis II.
There are organisms that do not have an interkinesis. The cells produced from meiosis I immediately proceed to meiosis II.
Word origin: Latin inter– (between) + Greek kinēsis (motion, movement)
See also:

You will also like...

Plant Auxins
Plant Auxins – Phototropism & Geotropism

Plants produce hormones to regulate their growth. Auxins, for instance, influence plant growth. Know the role of auxin i..

Darwin's Finches - Natural Selection
Darwin and Natural Selection

This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..

Adaptation Tutorial
Adaptation Tutorial

Adaptation, in biology and ecology, refers to the process or trait through which organisms or the populations in a habit..

Early Earth
The Origins of Life

This tutorial digs into the past to investigate the origins of life. The section is split into geological periods in the..

An artistic depiction of a human embryo
Growth and Development of a Human Baby

Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..

Running Water Freshwater Communities

This tutorial introduces flowing water communities, which bring new and dithering factors into the equation for possible..