Genetic Variation
- Created by: BioFreakinomics
- Created on: 02-03-16 19:19
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- Genetic Variation
- Crossing over
- Occurs in Prophase I
- Non-sister chromatids wrap around each other very tightly
- Chromosome may break at chiasmata & the broken ends re-join to the ends of non-sister chromatids
- Independent assortment
- Metaphase I
- Consequence of the random distribution of maternal & paternal chromosomes on the equator & the subsequent segregation
- Metaphase II
- Result of random distribution on the equator of sister chromatids
- Metaphase I
- Fertilisation
- Only one, randomly selected egg is released at a time from the ovary
- About 300 sperm all genetically different are released & any can fertilise the egg
- Mutation
- May occur during interphase when the DNA is replicated
- Untitled
- Crossing over
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