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The nuclear membrane and nucleolus both disappear during prophase of mitosis and meiosis.

The nucleolus is a region of the interphase nucleus containing many of the genes that code for ribosomal RNAs (rRNAs). The genes are on a number of different chromosomes, which have to folded in such a way that these genes end up in the same region of the nucleus. During prophase the chromosomes separate from one another, and so the nucleolus disappears.

The nuclear membrane has to be taken out of the way before metaphase, so that the chromosomes can move out of the confines of the nucleus. Enzymes break down the membrane into small fragments, which travel through the endoplasmic reticulum to the poles. They will be used to construct new nuclear membranes around the daughter nuclei during telophase.

##One thing should be remain that nuclear membrane never disappeared just disorganized when RNA come out from nucleolus. Again its reorganized when RNA form in nucleolus.
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10y ago

The nuclear membrane and nucleolus dissapear in prophase

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Q: In mitosis when does the nucleolus disappear?
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Why does nucleolus disappear during pro-phase of mitosis and what is the mechanism of dissapearence?

Nucleus and nucleolus disappear during pro-phase stage of mitosis,to be specific it disappears in late pro-phase stage and reappers during telophase stage of mitosis.


The nucleus and nucleolus disappear during what?

Prophase- first and longest stage of mitosis in prophase, the chromosomes condense, the nucleus and nucleolus disappear. The centrioles move toward opposite sides of animal cells. and the spindle begins to form and attach to the chromosomes.


Does the nucleolus disappear in mitosis?

Each diploid cell in the human body has one nucleolus which disappears at the onset of mitosis and is replaced by ten tiny nucleoli, five of which eventually come together to form the nucleoli of each new cell.


The final step in the mitosis process for animal cells is?

Telophase, where chromosomes uncoil, spindles disappear, nucleolus and nuclear envelope reappears.


The Nuclear Enevlope Begins To Disappear?

The following process happens in the prophase of mitosis, during which the nuclear envelope will disappear along with the nucleolus. The chromosomes are then ready to be moved to the center to be split.


What two structures disappear during prophase?

During prophase, the nuclear membrane and the nucleolus dissolve and disappear.


What stage of the cell cycle is the nucleolus always visible?

Interphase.


In what phase of mitosis are the nuclear envelope and nucleolus broken up and absorbed?

Prophase


Is the nucleus of a cell contained within the nucleolus?

the nucleolus is actually floating within the nucleus.


What phase of mitosis does nuclear membrane disappear?

Prophase


In which step of mitosis do the fiber begin to disappear?

The spindle fibers begin to disappear in Telophase


What forms durining telophase in animal mitosis?

Nucleolus is formed in nucleus.Nuclear membrane formed around.