Biology - Cell Division

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  • Created by: tps-josh
  • Created on: 07-11-16 21:21
In body cells the _______ are normally found in pairs. Body cells divide by _______.
In the body cells the chromosomes are normally found in pairs. Body cells divide by mitosis.
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What do chromosome contain?
The chromosomes contain the genetic information.
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What cells divide what is copied? What is produced when a cell divides by mitosis?
When a body cell divides by mitosis: copies of the genetic material are made. Then the cell divides once to form two genetically identical body cells.
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Why do cells divide by mitosis?
Mitosis occurs during growth or to produce replacement cells.
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How do the chromosomes in body cells differ from those in gametes?
Body cells have two sets of chromosomes; sex cells (gametes) have only one set.
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Where are gametes made in humans?
Cells in reproductive organs - testes and ovaries in humans - divide to form gametes.
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What type of cells division makes gametes?
The type of cell division in which a cell divides to form gametes is called meiosis.
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What is produced when a cell divides by meiosis?
When a cell divides to form gametes: copies of the genetic information are made, then the cell divides twice to form four gametes, each with a single set of chromosomes.
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When gametes join at __________, a single body cell with ________ pairs of chromosomes is formed. A new individual then develops by this cell repeatedly dividing by ________.
When gametes join at FERTILISATION, a single body cell with NEW pairs of chromosomes is formed. A new individual then develops by this cell repeatedly dividing by MITOSIS.
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What is the difference between differentiation in animal cells and plant cells? What are mature animal cells restricted to and how is this different to mature plant cells?
Most types of animal cells differentiate at an early stage whereas many plant cells retain the ability to differentiate throughout life. In mature animals, cell division is mainly restricted to repair and replacement.
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What are stem cells? Where can we get stem cells from?
Cells from human embryos and adult bone marrow, called stem cells, can be made to differentiate into many different types of cells, e.g. nerve cells.
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What can human stem cells do?
Human stem cells have the ability to develop into any kind of human cell.
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How might we be able to use stem cells?
Treatment with stem cells may be able to help conditions such as paralysis.
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The cells of the offspring produced by _______ reproduction are produced by ______ from the parental cells. They contain the same ________ as the parents.
The cells of the offspring produced by ASEXUAL reproduction are produced by MITOSIS from the parental cells. They contain the same ALLELES as the parents.
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Other cards in this set

Card 2

Front

What do chromosome contain?

Back

The chromosomes contain the genetic information.

Card 3

Front

What cells divide what is copied? What is produced when a cell divides by mitosis?

Back

Preview of the front of card 3

Card 4

Front

Why do cells divide by mitosis?

Back

Preview of the front of card 4

Card 5

Front

How do the chromosomes in body cells differ from those in gametes?

Back

Preview of the front of card 5
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