Dictionary > Diakinesis


The final stage of prophase I of meiosis I in which the chromosomes condense, the nucleolus fragments and the nuclear envelope disperse
Meiosis is form of cell division that gives rise to genetically diverse sex cells or gametes. It is comprised to two successive nuclear divisions namely meiosis I and meiosis II. Meiosis I is comprised of four stages: prophase I, metaphase I, anaphase I, and telophase I. Prophase I is the first stage and consists of the following sub-stages: leptotene, zygotene, pachytene, diplotene and diakinesis.
Diakinesis is the final stage of prophase I. In human and other mammalian ootidogenesis, the cell (i.e. primary oocyte) is in the arrested state (called dictyate) prior to diakinesis. The rest of the stages of meiosis resumes by the time of puberty. Diakinesis is highlighted by further chromosome condensation, disintegration of the nuclear envelope into vesicles, and the seemingly disappearance of the nucleolus. The four chromatids as well as the chiasmata are now more clearly visible at this point. Meiotic spindle fibers also start to form in preparation for the next stage of meiosis I, the metaphase I.
Word origin: Greek dia (“through”) + kin─ôsis (movement)
See also:

You will also like...

Sensory systems
Sensory Systems

A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..

Biological Viruses
Biological Viruses

Viruses possess both living and non-living characteristics. This unique feature distinguishes them from other organisms...

Human Nervous System
The Human Nervous System

The nervous system is essentially a biological information highway. This tutorial gives an overview of the nervous syste..

Adaptive Radiation
Adaptive Radiation

The diversification of several new species from a recent ancestral source, each adapted to utilize or occupy a vacant ad..

The process of photosynthesis
Photosynthesis – Photolysis and Carbon Fixation

Photosynthesis is the process that plants undertake to create organic materials from carbon dioxide and water, with the ..

Balanced Diet
A Balanced Diet – Minerals and Proteins

Proteins and minerals can be derived from various dietary sources. They are essential for the proper growth and developm..