The 2 concepts provide some additional profile out-of anaphase separa- tion
Brand new Relatives regarding Mitosis and you may Meiosis (considering Darlington). Note that the new chromosomes try twice in the the first appearance inside mitosis, but not throughout the very first (leptotene) phase out of meiotic prophase. It pair inside the zygotene, beginning to be twice (split) into the pachytene, and they are double in the last grade out of meiotic prophase (diplotene and you will diakinesis). During the mitosis anaphase begins because of the section of your own centromeres, but in meiosis this doesn’t occur before anaphase away from the second division (not revealed). Darlington are the first to ever advise that if your parasynaptic interpre- tation is actually implemented, all of the differences between meiosis and you may mitosis can be, with hardly any hypotheses, become deduced on amazing difference between the new singleness otherwise doubleness of your prophase threads.
The guy ideal that homologous chromosomes, or in other words homologous chromonemata, attention each other in the pairs. This attraction is actually met when you look at the mitotic prophase, yet not at the beginning of meiotic prophase, where chromosomes is located at very first single, and can just satisfy the destination by upcoming together for the zygotene combining. In the meiosis, the spHtting of one’s chromosomes, and that happens in this new interphase in advance of a great mitotic office, cannot happen right up until pachytene in the event the chromosomes are usually related for the pairs. It for this...
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