During prophase II, the chromosomes condense, and a new set of spindle fibers forms. The chromosomes begin moving toward the equator of the cell. During metaphase II, the centromeres of the paired chromatids align along the equatorial plate in both cells.
What is the equatorial plate in mitosis?
An arrangement of the chromosomes in which they lie approximately in one plane, at the equator of the spindle. This is seen during metaphase of mitosis and meiosis.
What form is prophase in?
During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses. The chromatin coils and becomes increasingly compact, resulting in the formation of visible chromosomes. Chromosomes are made of a single piece of DNA that is highly organized.
What is the function of a cell plate?
A disc like structure in the plane of the equator of the spindle that separates the two sets of chromosomes during cytokinesis; also involved in the formation of cell wall between the two daughter cells following cell division.
What is double Metaphasic plate?
A double metaphasic plate is formed by centromeres in metaphase-I but only one in metaphase-II. Chromosomes are independent and do not show connections. … Two chromatids of a chromosome are genetically similar. The two chromatids of a chromosome are often genetically different due to crossing over.
What 3 things happen during anaphase?
Anaphase. The sister chromatids separate from one another and are pulled towards opposite poles of the cell. The microtubules that are not attached to chromosomes push the two poles of the spindle apart, while the kinetochore microtubules pull the chromosomes towards the poles.
What is the function of prophase 1?
Prophase I highlights the exchange of DNA between homologous chromosomes via a process called homologous recombination and the crossover at chiasma(ta) between non-sister chromatids. Thus, this stage is important to increase genetic variation.
How many metaphase plate are formed?
Since meiosis is comprised of two meiotic divisions, the metaphase plate is seen twice, i.e. in metaphase I and in metaphase II. The spindle apparatus that form during prophase is the one that facilitates the alignment of chromosomes at the equatorial region.
What is meant by metaphase plate?
Medical Definition of metaphase plate
: a plane cell section in the equatorial plane of the metaphase spindle having the chromosomes oriented upon it.