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18 Cards in this Set
- Front
- Back
How do stem cells differentiate? |
Genes switch it on and off and tell it what to become |
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How do body cells divide? |
Mitosis |
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What do chromosomes contain?
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Genetic Information
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What happens when a body cell divides by mitosis? |
Copies of the genetic material are made
The cell divides once to form two identical body cells |
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When/why does mitosis happen? |
During growth or to produce replacement cells and to repair |
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How many sets of chromosomes (23 chromosomes) do body cells have? |
2 |
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How many sets of chromosomes (23 chromosomes) do gametes have? |
1 |
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How do gametes divide? |
Meiosis |
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What happens in meiosis? |
Copies of the genetic information are made
The cell divides twice to form four gametes, each with a single set of chromosomes (23 chromosomes) |
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What happens when gametes fuse at fertilisation? |
A single body cell with new pairs of chromosomes is formed. An individual develops by this cell repeating by mitosis |
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When do animal cells differentiate? |
At an early stage |
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When do plant cells differentiate? |
Plant cells retain the ability to differentiate throughout life |
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What adult cells can be made to differentiate into many different types, and where are they found? |
Stem cells, found in adult bone marrow |
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What can human stem cells do? |
Develop into any kind of human cell |
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How do stem cells differentiate? |
Genes switch it on and off and tell it what to become |
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What can treatment with stem cells be used to help? |
Paralysis |
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How are cells of the offspring produced by asexual reproduction produced? |
Mitosis |
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What are their alleles like? |
They are the same as their parents |