simple inheritance in animals and plants
- Created by: ALICIA SMITH
- Created on: 21-04-13 09:55
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- Simple inheritance in plants and animals
- Cell division and growth
- Mitosis
- cell division in the normal body and divides into 2
- it copies the chromosomes in the nucleus and then divides to from 2 genetically identical cells
- this is done to renew the cells in your body (i.e skin cells)
- Differentiation
- stem cells are unspecialised cells
- specialised cells can only divide into the same sort of cell
- Mitosis
- Cell division in sexual repoduction
- Meiosis
- results in the gametes
- Each gamete is slightly different to one another
- similar to mitosis but it will divide into 2 again to form a total of 4 daughter cells each with a single set of chromosomes
- Fertilisation
- once fertilization takes place mitosis starts to occur
- the combination of genes after fertilisation is always unique
- Meiosis
- Stem cells
- an embryo is a collection of unspecialised cells which can then turn into any type of cell it needs to
- even as an adult you still have stem cells in your bone marrow
- stem cells in your bone marrow are only needed when replacing damaged cells (normally blood cells)
- embryonic stem cells can be cultured to form organs
- however there are a lot of ethicl issues
- Cell division and growth
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