[Qiness]

When cells duplicates its content does it mean there is 46 pair after the 23 original pair duplicates its content???

Plus the into detail explaination of mitosis please!!!

[seventyfourable]

Before a cell undergoes mitosis, DNA replication occurs in which each strand copies it self. Therefore, there is double the DNA.
Mitosis occurs in the following steps:
Interphase - this is where the DNA replication occurs
Prophase - this is where the chromosomes pair up and condense becoming shorter and fatter and visible under a microscope.
Metaphase - the homologous chromosomes line up along the equator of the cells and spindles attach
Anaphase - the chromatids are pulled to opposite poles of the cell
Telphase - the chromatids are collected at opposite ends of the cell. The nuclear membrane forms around the chromatids and the cells separate

[Qiness]

(Original post by seventyfourable)
Before a cell undergoes mitosis, DNA replication occurs in which each strand copies it self. Therefore, there is double the DNA.
Mitosis occurs in the following steps:
Interphase - this is where the DNA replication occurs
Prophase - this is where the chromosomes pair up and condense becoming shorter and fatter and visible under a microscope.
Metaphase - the homologous chromosomes line up along the equator of the cells and spindles attach
Anaphase - the chromatids are pulled to opposite poles of the cell
Telphase - the chromatids are collected at opposite ends of the cell. The nuclear membrane forms around the chromatids and the cells separate

thanks very much man, but can you tell me how many Chromosomes there are after the replication and just before the prophase occurs???

[Piprod01]

(Original post by Qiness)
thanks very much man, but can you tell me how many Chromosomes there are after the replication and just before the prophase occurs???

Technically speaking, the number of chromosomes stay the same since a chromosome that has duplicated it's genetic content is attached to the other copy - When DNA condences in Prophase it's the classic picture of a chromosome and looks like an "X". It's just the way we define a Chromosome.

[Amangee]

The chromosomes are 23 pairs. When DNA replication has occurred the identical two helix shaped strands form X chromosomes. Each arm of the chromosome is identical to each other.