significance of meiosis
- Created by: vezting
- Created on: 18-10-15 17:08
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- Signifacance of Meiosis
- Meiosis and variation
- crossing over during prophase 1
- random assortment of chromosome in metaphase 1
- random distribition of and segregation of sister chromatids during metaphase and anophase 2
- Mutations
- DNA mutations occur during interphase
- Chromosome mutations may also occur
- if mutations occur during fertilization the mutation will be present in offspring
- crossing over in detail
- non-sister chromatids wrap tightly at the chiasmata causing the chromatids to break, so the broken ends join the non-sister chromatid of the same bivalent
- this produces new combinations of alleles
- the chiasmata remains in place until anaphase 1 holding materna and paternal opposite ways so one memeber goes to each pole
- Meiosis and variation
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