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ORGAN IDENTITY GENES. "The involvement of organ identity genes in controlling the sex related differences in organ development in unisexual species is more likely in those species which do not initiate the inappropriate organs and do not go through a hermaphrodite phase." https://lnkd.in/gb3zS32 View in LinkedIn

PLANT SEX GENES. "Although sex chromosomes in flowering plants are rare, plants have evolved systems which are analogous to the main chromosomally-based systems in animals. For example, the Silene species have an active Y system similar to that in mammals where the Y chromosome acts as a maleness enhancer as well as suppressing the gynoecium." https://lnkd.in/gb3zS32 View in LinkedIn

MUTANT INSIGHTS. "Organ suppression might arise as a consequences of the differential expression patterns of the B and C function genes. Mutants of the B function genes in hermaphroditic plants are effectively female with homeotic transformations of petals to sepals in the second whorl and stamens to carpels in the third whorl." https://lnkd.in/gb3zS32 View in LinkedIn

RECENT ADDITION. "Plant sex chromosomes are probably of relatively recent origin, in contrast to the situation in animals, and thus afford the opportunity of investigating recent chromosome evolution." https://lnkd.in/gb3zS32 View in LinkedIn

SEX GENE CANDIDATES. "One of the first molecular targets has been the MADS box genes which control the identities of the floral organs in hermaphroditic plant species." https://lnkd.in/gb3zS32 View in LinkedIn

INFO GAP. "There is relatively little information available on the molecular basis of sex determination and it is even difficult to estimate the numbers of genes involved, particularly as the genes which result in organ suppression are unlikely to be the primary sex determining genes." https://lnkd.in/gb3zS32 View in LinkedIn

VARIETY OF SUPPRESSIONS. "This variation in timing and nature of suppression argues for the existence of a variety of different underlying mechanisms." https://lnkd.in/gb3zS32 View in LinkedIn

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

ABORTION OF ONE SEX. "In most species, however, both sets of sex organs are initiated and the inappropriate set of organs develops to some extent before abortion." https://lnkd.in/gb3zS32 View in LinkedIn

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