Was ist die Metaphaseplatte?
Die Äquatorialebene eines Planeten ist die Ebene, die seinen Äquator enthält. Hier bezeichnet die Äquatorialebene, auch Äquatorialplatte oder Metaphaseplatte genannt, die gedachte „Mitte“ der Zelle. In der Metaphase sammeln sich die Chromosomen bei der Mitose und die Tetraden bei der Meiose I an der Äquatorialebene.
Was wird bei der Meiose voneinander getrennt?
In der Meiose 1 werden homologe Chromosomenpaare voneinander getrennt. Ein homologes Chromosomenpaar oder ein homologer Chromosomensatz befindet sich in einer diploiden Zelle. Darunter kannst du ein Chromosomenpaar verstehen, das in Abfolge und Gestalt der Gene gleich ist.
What is the meaning of metaphase plate?
Definition of metaphase plate : a section in the equatorial plane of the metaphase spindle having the chromosomes oriented upon it : a plane cell section in the equatorial plane of the metaphase spindle having the chromosomes oriented upon it
How are microtubules formed in metaphase?
Preceded by events in prometaphase and followed by anaphase, microtubules formed in prophase have already found and attached themselves to kinetochores in metaphase. In metaphase, the centromeres of the chromosomes convene themselves on the metaphase plate (or equatorial plate ), an imaginary line that is equidistant from the two centrosome poles.
How do the events of prometaphase and metaphase coincide?
Early events of metaphase can coincide with the later events of prometaphase, as chromosomes with connected kinetochores will start the events of metaphase individually before other chromosomes with unconnected kinetochores that are still lingering in the events of prometaphase.
Where are the chromosomes lined up during metaphase?
Chromosomes lined up on the metaphase plate. Two views with the metaphase plate rotated 60°. Metaphase (from the Greek μετά, „adjacent“ and φάσις, „stage“) is a stage of mitosis in the eukaryotic cell cycle in which chromosomes are at their second-most condensed and coiled stage (they are at their most condensed in anaphase ).