Metaphase, Biology

Metaphase

This  is a period  of short duration, the  chromosomes are  at the  stage of their  maximum  condensation and , hence more  clearly  visible ,Upon  each  side  of their  centromeres,  a plate or cup like  dise ,formed  of protein  complexes  and  called  kinetochore , appears in the  depression  of the chromatid  of this  side  the  kinetochore  of each side  is seen to be attached  to  a bundle  of a number ( usually  20  to 40 )  of newly  formed spindle  fibres   called discontinuous , or  attachment , or chromosomal ,  or interzonal  spindle  fibres . The  opposite  ends of  these  fibres   are attached to the  spindle poles of their  respective sides. These  fibres pull  the scattered  chromosomes and  align then  in a fixed  specific  manner at the equatorial plane  of the spindle  forming  what is  known  as the equatorial or  metaphase plate.

Posted Date: 10/4/2012 2:47:41 AM | Location : United States







Related Discussions:- Metaphase, Assignment Help, Ask Question on Metaphase, Get Answer, Expert's Help, Metaphase Discussions

Write discussion on Metaphase
Your posts are moderated
Related Questions
What is osseointegration The smaller the devital zone that forms around the implant subsequent to the surgical trauma, the more likely rigid fixation will occur. The aim is to

Q. What are the few examples of movement created by the contraction of sarcomeres of the muscle cells? The handling of a cup of coffee, the peristaltic movements of the bowels,

Where does poop come from?


Explain the Urinary excretion of Ascorbic Acid? The urinary excretion of ascorbic acid falls when the dietary intake is low. Since the tissues are not saturated, a greater part

Define the Food Pricing? The pricing of the food products bought by the consumer is subject to multifarious factors. Each of the factors as discussed below can affect the prici

What does radial symmetry mean? What is the type of symmetry found in chordates? Which are other phyla of the animal kingdom that present species with radial symmetry? Radial

Which are the main cells of the nervous system? The major cells of the nervous system are the neurons. Besides the neurons the nervous system is also constituted of glial cells

How are the three main arthropod classes characterized according to the body division? In crustaceans and arachnids the head is fused with the thorax forming the cephalothorax.