GCSE Combined Science AQA - Cell division
- Created by: sean0254
- Created on: 05-04-18 11:08
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- Cell division
- The nucleus of a cell contains chromosomes made of DNA molecules.
- Each chromosome carries a large number of genes.
- In body cells the chromosomes are normally found in pairs.
- The cell cycle is when cells divide.
- Before a cell can divide, it needs to grow; it needs more mitochondria and ribosomes.
- The DNA replicates to form two copies of each chromosome.
- Mitosis happens, pulling one set of chromosomes to each end of the cell, dividing the nucleus.
- The cytoplasm and cell membrane then divide. Two identical cells.
- This is important in the growth of multicellular organisms.
- Mitosis happens, pulling one set of chromosomes to each end of the cell, dividing the nucleus.
- The DNA replicates to form two copies of each chromosome.
- Before a cell can divide, it needs to grow; it needs more mitochondria and ribosomes.
- Stem cells are not differentiated. It is capable of giving rise to many more cells.
- Stem cells can be taken from human embryos for cloning, adult bone marrow to form blood cells, and from meristem tissue in plants.
- Treatment with stem cells can help treat diabetes or paralysis
- Stem cells can be taken from human embryos for cloning, adult bone marrow to form blood cells, and from meristem tissue in plants.
- Therapeutic cloning is when an embryo is produced with the same genes as the patient.
- Stem cells can be taken from this embryo to treat medical conditions.
- Stem cells can transfer viruses, and some people have ethical objections.
- Rare species can be cloned to protect from extinction by the use of stem cells from meristem tissue.
- Crops with special features can also be cloned to produce large numbers for farmers.
- Rare species can be cloned to protect from extinction by the use of stem cells from meristem tissue.
- Stem cells can transfer viruses, and some people have ethical objections.
- Stem cells can be taken from this embryo to treat medical conditions.
- The nucleus of a cell contains chromosomes made of DNA molecules.
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