Table of Contents
- 1 What is the process during which the nucleus of a cell is divided into two nuclei?
- 2 During what part of the cell cycle is the DNA in a cell’s nucleus replicated?
- 3 What are the two processes that occur to DNA in the nucleus of the cell?
- 4 What are the steps of the nucleus?
- 5 What is the sequence of stages during the cell cycle?
- 6 How are chromosomes divided in mitosis and cell division?
- 7 Why do centrioles move away from each other in mitosis?
What is the process during which the nucleus of a cell is divided into two nuclei?
Mitosis is the process in cell division where the nucleus divides into two nuclei, each with an identical set of chromosomes. Mitosis is divided into four phases: prophase, metaphase, anaphase, and telophase. The shortest stage of the cell cycle is called cytokinesis (division of the cytoplasm).
During what part of the cell cycle is the DNA in a cell’s nucleus replicated?
During interphase, the cell grows and the nuclear DNA is duplicated. Interphase is followed by the mitotic phase. During the mitotic phase, the duplicated chromosomes are segregated and distributed into daughter nuclei.
What are the two processes that occur to DNA in the nucleus of the cell?
Two of the major activities that take place in the nucleus are: DNA replication (the synthesis of new DNA in preparation for cell division) and transcription (the production of RNA copies of parts of the DNA sequence).
In what stage does the G1 S and G2 phases happen?
Interphase is composed of G1 phase (cell growth), followed by S phase (DNA synthesis), followed by G2 phase (cell growth). At the end of interphase comes the mitotic phase, which is made up of mitosis and cytokinesis and leads to the formation of two daughter cells.
What is the correct order of steps in the cell cycle?
The cell cycle is a four-stage process in which the cell increases in size (gap 1, or G1, stage), copies its DNA (synthesis, or S, stage), prepares to divide (gap 2, or G2, stage), and divides (mitosis, or M, stage). The stages G1, S, and G2 make up interphase, which accounts for the span between cell divisions.
What are the steps of the nucleus?
Karyokinesis, also known as mitosis, is divided into a series of phases (prophase, prometaphase, metaphase, anaphase, and telophase) that result in the division of the cell nucleus.
What is the sequence of stages during the cell cycle?
How are chromosomes divided in mitosis and cell division?
During mitosis, chromosomes are duplicated and divided evenly between two cells. The process begins with interphase and ends with cytokinesis. During mitosis, chromosomes are duplicated and divided evenly between two cells. The process begins with interphase and ends with cytokinesis. Menu Home The Stages of Mitosis and Cell Division Search
What happens to the nucleus of a cell before mitosis?
These onion root tip plant cells are in interphase, prior to the start of mitosis. The cell nucleus, nuclear membrane, nucleolus, and chromatin are visible. Ed Reschke/Photolibrary/Getty Images. Before a dividing cell enters mitosis, it undergoes a period of growth called interphase.
How are daughter cells produced in mitosis and meiosis?
At the end of cytokinesis, two genetically identical daughter cells are produced. These are diploid cells, with each cell containing a full complement of chromosomes. Cells produced through mitosis are different from those produced through meiosis. In meiosis, four daughter cells are produced.
Why do centrioles move away from each other in mitosis?
The two pairs of centrioles (formed from the replication of one pair in Interphase) move away from one another toward opposite ends of the cell due to the lengthening of the microtubules that form between them. Polar fibers, which are microtubules that make up the spindle fibers, reach from each cell pole to the cell’s equator.