Meiosis - Mendelian Genetics - Genetics and Evolution
- Created by: Laura Dewhurst
- Created on: 01-12-14 10:21
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- Meiosis -Mendelian Genetics - Genetics and Evolution
- Meiosis
- DNA is replicated only once
- Two nuclear divisions
- Meiosis 1 and Meiosis 2
- Reduces number of chromosomes to n
- Meiosis 1
- Early prophase 1
- DNA replicated and tangled
- Mid prophase 1
- Lining up to allow crossover
- fully packaged chromosomes
- genetic variation
- Late prophase 1 - prometaphase
- crossing over, envelope breaking down
- Metaphase 1
- lining up on equatorial plate
- Anaphase 1
- Independent assortment and random segregation
- Separated to opposite sides
- Telophase 1
- Unpackaging of cell
- Two daughter cells
- Early prophase 1
- Meiosis 2
- Follows interkinesis
- Prophase 2
- Packed with proteins to make chromosomes
- Metaphase 2
- Line up on equatorial plate
- Anaphase 2
- Chromosomes pulled apart
- Daughter chromosomes
- Telophase 2
- Products
- 4 cells
- n
- Differ in genetic composition
- Human 23 chromosome pairs
- 8388608 different combinations by independent assortment
- add in crossing over, almost infinite possible combinations
- Meiosis
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