What phase does the spindle is formed?
Formation of spindle apparatus occurs during prometaphase stage. The spindle fibers attach to the centromere. The nuclear membrane breaks apart into numerous “membrane vesicles”, and the chromosomes inside form protein structures called kinetochores.
During which part of the cell cycle does the mitotic spindle assemble quizlet?
M phase (prophase): Mitotic spindle assembly begins.
What occurs during the M phase of the cell cycle quizlet?
M phase is the phase during which the nucleus divides (mitosis) and the cytoplasm divides (cytokinesis). … Division of the nucleus of a eucaryotic cell, involving condensation of the DNA into visible chromosomes.
What happens in G2 phase?
During the G2 phase, extra protein is often synthesized, and the organelles multiply until there are enough for two cells. Other cell materials such as lipids for the membrane may also be produced. With all this activity, the cell often grows substantially during G2.
During what stage does G1 S and G2 phase happen?
Interphase. G1, S and G2 phases are all cumulatively referred to as interphase involving the growth of a cell and the replication of its DNA.
How is mitotic spindle formed?
At the beginning of nuclear division, two wheel-shaped protein structures called centrioles position themselves at opposite ends of the cell forming cell poles. Long protein fibers called microtubules extend from the centrioles in all possible directions, forming what is called a spindle.
What is the mitotic spindle made of?
The mitotic spindle is a highly dynamic molecular machine composed of tubulin, motors, and other molecules. It assembles around the chromosomes and distributes the duplicated genome to the daughter cells during mitosis.
What is the function of the mitotic spindle quizlet?
The spindle is necessary to equally divide the chromosomes in a parental cell into two daughter cells during both types of nuclear division: mitosis and meiosis. During mitosis, the spindle fibers are called the mitotic spindle.
What are the components of the mitotic spindle quizlet?
The mitotic spindle begins to form. It is composed of the centrosomes and the microtubules that extend from them. The radial arrays of shorter microtubules that extend from the centrosomes are called asters. The centrosomes move away from each other, propelled partly by the lengthening microtubules between them.