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downs syndrome and Replication
Transcript of downs syndrome and Replication
Mitosis is a type of cell division. Mitosis occurs wherever more cells are needed. It produces two new cells that are identical to each other, and to the parent cell. The process of growth and division is called the cell cycle.
Write a description of Meiosis
To know the causes of Downs syndrome
To know how cells reproduce through meiosis and mitosis
To answer related questions
What causes Downs syndrome?
The cycle starts as the number of organelles - the different parts of the cell - increases. This is to ensure that each of the two new cells receives copies of all the organelles.
Before a cell divides, its chromosomes are copied exactly. The DNA molecule is made of two strands. As each of the two strands separate, new strands are made alongside each of them, thereby making two new copies.
Mitosis and meiosis are two ways that cells reproduce.
By mitosis a cell splits to create two identical copies of the original cell.
In meiosis cells split to form new cells with half the usual number of chromosomes, to produce gametes for sexual reproduction.