Abstract:Sex chromosomes are known from a minority of flowering plants (angiosperms), and from some haploid plants, but the sex‐determining chromosomes of many dioecious plants (i.e. species with the sexual stage individuals being either purely male or female) are either unstudied, or are not morphologically different between the two sexes. Both these observations and the taxonomically scattered distribution of species with sex chromosomes suggest that many plant sex chromosome systems evolved recently and independentl… Show more
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