AND How does metaphase 1 and metaphase of mitosis/metaphase 2 differ?
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How is genetic variation increased by fertilization?
> meiosis produces genetically varied gamates having half the number of chromsomes than the species normal chromosomes. At the time of fertilization, a random gamate (sperm) comes and fuses with the egg. Their are 2^23 combinations that can be there. So the result is variation if any type of the sperm or egg fuse.
How does metaphase 1 and metaphase of mitosis/metaphase 2 differ?
> In metaphase 1 the tetrads (homologous chromsomes) are laid at the equatorial plate ready to be pulled apart, but in metaphase 2 or mitotic metaphase, the chromosomes in their replicated forms bearing sister chromatids are laid at the equatorial plate.
> meiosis produces genetically varied gamates having half the number of chromsomes than the species normal chromosomes. At the time of fertilization, a random gamate (sperm) comes and fuses with the egg. Their are 2^23 combinations that can be there. So the result is variation if any type of the sperm or egg fuse.
How does metaphase 1 and metaphase of mitosis/metaphase 2 differ?
> In metaphase 1 the tetrads (homologous chromsomes) are laid at the equatorial plate ready to be pulled apart, but in metaphase 2 or mitotic metaphase, the chromosomes in their replicated forms bearing sister chromatids are laid at the equatorial plate.