Meiosis
- Created by: chickpeatweet
- Created on: 18-01-15 13:45
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- Meiosis
- Process
- 1. Homologous Pairs line up
- 2. Cell divides - chromosome from each pair in each cell
- 3. Chromosomes divide into chromatids - cell divides and one chromatid in each one
- 2. Cell divides - chromosome from each pair in each cell
- 1. Homologous Pairs line up
- 1st Division
- Number of chromosomes halves
- Crossing over can occur between homologous pairs
- Homologous pairs line up random order - random alignment
- Key Ideas
- Process of nucleus dividing
- Produces gamates
- Haploid cells
- Produces 4 daughter cells
- Cause of variation - allows adaption and survival
- Variaiton
- Segregation (random alignment)
- Number of possible outcomes due to this - 2^n n=number of chromosomes
- Crossing over - chromatids of pairs twist, break and swap over
- Genetic Combination - chromosomes with own alleles distribute randomly and cells containing fuse randomly at fertilisation
- Segregation (random alignment)
- Process
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