What is an important event that occurs in prophase?
During prophase, the chromosomes condense and centrosomes move to opposite sides of the nucleus, initiating formation of the mitotic spindle. Breakdown of the nuclear envelope then allows spindle microtubules to attach (more…)
What are two events of prophase quizlet?
Chromosomes condense, the spindle forms, and the nuclear envelope disintegrates.
What are the major events that occur during prophase and why are these events important to the process of cell division?
Prophase is the first stage in mitosis, occurring after the conclusion of the G2 portion of interphase. During prophase, the parent cell chromosomes — which were duplicated during S phase — condense and become thousands of times more compact than they were during interphase.
How is prophase I different from prophase II?
Prophase 1 is the initial phase of meiosis 1 and prophase 2 is the initial phase of meiosis 2. The main difference between prophase 1 and 2 is that genetic recombination occurs through crossing overs and the “Chiasmata” formation during prophase 1 whereas no genetic recombination is noticed at the prophase 2.
What are the two most important structures involved in moving chromosomes during mitosis?
Duplicated centrioles are responsible for moving chromosomes during mitosis. They are involved in the formation and organization of spindle during cell division (mitotic phase) and also in the process of cytokinesis.
What happens during prophase quizlet?
What happens during prophase? A cells genetic DNA condenses, spindle fibers begin to form and the nuclear envelope dissolves. The duplicated chromosomes line up and spindle fibers connect to the centromeres. You just studied 9 terms!
Which of the following events occurs in prophase 1?
The correct answer is (c) synapsis and crossing over. During prophase I of meiosis, synapsis and crossing over take place.
What events happen in prophase I that are different from the events that happened in prophase of mitosis?
The most notable difference between prophase in plant cells and animal cells occurs because plant cells lack centrioles. The organization of the spindle apparatus is associated instead with foci at opposite poles of the cell or is mediated by chromosomes. In mitotic prophase I of plants, this band disappears.