linkedin post 2017-11-08 05:23:37

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INDEPENDENT BUT SIMILAR. "Sex-chromosomes in flowering plants have evolved independently but have a number of features in common. The X and Y chromosomes are always the largest chromosomes in the complement (and probably in the entire genus) and the Y chromosomes (or summed Y-multiples) are much larger than the X in all species except Humulus lupulus and Viscum." https://lnkd.in/gb3zS32 View in LinkedIn
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linkedin post 2017-11-09 05:40:31

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EARLY DIVERGENCE. "In a number of dioecious species, including Mercurialis annua, Cannabis sativa, Spinacia oleracea, and Humulus species, the divergence of the male and female developmental pathways occurs extremely early in floral development and the inappropriate organs are not initiated." https://lnkd.in/gb3zS32 View in LinkedIn
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linkedin post 2017-11-09 05:43:02

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LATE DIVERGENCE. "In a small number of dioecious species such as Actinidia deliciosa and Asparagus officinalis, the developmental divergence occurs so late that male and female flowers are superficially indistinguishable from each other and from perfect flowers." https://lnkd.in/gb3zS32 View in LinkedIn
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