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 gr 6 comparison between MITOSIS & MEIOSIS ,enjoy it:))

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DR_SALLY



Posts : 185
Join date : 2010-01-28

PostSubject: gr 6 comparison between MITOSIS & MEIOSIS ,enjoy it:))   Sun Feb 07, 2010 5:52 pm



MEIOSIS

MITOSIS

Point of comparison

The cell copies its DNA or its chromosomes

The cell copies its DNA or its chromosomes

THE DUPLICATION

disappears

disappears

THE MEMBRANE AROUND THE NUCLEAS

visible

Becomes visible

The twin chromosomes

Pairs of the twin chromosomes line up at the middle of the cell.

Pairs of twin chromosomes line up at the middle of the cell

Lining up of the twin chromosomes

Each pair of the chromosome move to one end of the cell

Each pair of the chromosome separate and move to each end of the cell

Movement of the each pair to one end of the cell

A membrane is formed around each group of chromosomes.

Nuclear membrane is formed around each pair of the chromosome(nucleus)

Formation of the nuclear membrane around each set of chromosomes

The cell divides into two new cells in which each of them has a full set of chromosomes.

In this stage the cytoplasm divides how?

The cytoplasm pinching inwards in case of the animal cell

While in the plant cell:a new cell wall divides one plant cell into two.

The formation of the two new daughter cells

Twin chromosomes line up in the middle of the cell

They split

The single chromosome move to the opposite side of the cell



A new nuclear membrane is formed around each set of chromosomes (1/2) the original number of chromosomes.



The cell divide in two new cells with half the number of chromosomes of the original cells that result in the formation of two sex cells



Occurs only in the reproductive organs of both males and females to produce sex cells with half sets of chromosomes that when fuses together in a process called fertilizationresult in the formation of a cell with complete set of chromosomes that grows and multiplies by mitosis to form a new organism .

It occurs in during cell growth or during the repairing of damaged cells that is why mitosis results in cells with full set of chromosomes.

Where can we find this process occurs in our body?

The main purpose of the process

Result in four cells with half the number of chromosomes which are called the sex cells

In female the sex cell is called the egg cell while in the males it is called the sperm cell

Resulting in two identical cells with full number of chromosomes they are called the daughter cells

The number of the resulted cells
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