The Anatomy of the Prokaryotic Genome
Which phase do chromosomes meet in the middle?
During prophase I, homologous chromosomes pair up and exchange sections of DNA. This is called recombination or crossing over. This is followed by metaphase I where the connected pairs of chromosomes align at the middle of the cell.
What is the phase of mitosis chromosomes in the middle?
During metaphase, the cell’s chromosomes align themselves in the middle of the cell through a type of cellular “tug of war.” The chromosomes, which have been replicated and remain joined at a central point called the centromere, are called sister chromatids.
What are the 4 phases of mitosis and what happens in each?
There are four stages of mitosis: prophase, metaphase, anaphase and telophase.1) Prophase: chromatin into chromosomes, the nuclear envelope break down, chromosomes attach to spindle fibres by their centromeres 2) Metaphase: chromosomes line up along the metaphase plate (centre of the cell) 3) Anaphase: sister …
Why do the chromosomes line up in the middle?
In animal cells, the chromosomes line up in the center of the cell. … Therefore, a safety mechanism called the spindle assembly checkpoint ensures that all of the chromosomes have correctly attached to the spindle before chromosome separation begins.
What is mitosis write metaphase stage?
The third phase of mitosis is known as metaphase, which is the process that separates duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. …
What is the phase of mitosis?
Today, mitosis is understood to involve five phases, based on the physical state of the chromosomes and spindle. These phases are prophase, prometaphase, metaphase, anaphase, and telophase.