Sex-chromosome of <i>Phyllospadix</i>

Karyotype and Sex-Chromosome Polymorphism in Nesokia indica, from Iran

Sex Chromosome Meiotic Drive

Meiotic sex chromosome inactivation

X chromosome inactivation is most commonly studied in the context of female mammalian development, where it performs an essential role in dosage compensation. However, another form of X-inactivation takes place in the male, during spermatogenesis, as germ cells enter meiosis. This second form of X-inactivation, called meiotic sex chromosome inactivation (MSCI) has emerged as a novel paradigm fo...

Sex Chromosome Equality in Plants

Birds do it, bees do it—and now it appears that even plants do it. No, it’s not what you’re thinking. Sexual reproduction is obviously well-known in plants. Rather, the phenomenon in question is equalizing sex chromosome expression in males and females. In animals where males are XY and females are XX, the Y chromosome has lost most of its genes, so X chromosome expression is adjusted to keep t...

Sex chromosome activation during spermatogenesis.

INACTIVATION of chromosomal elements is a process which takes place in various organisms, cell types, and cell cycle stages. The reasons for chromosome inactivation, which is superimposed on the more specific level of gene control, are different for the various systems. Dosage compensation in female mammals us. mitotic chromosome shut-off are the extreme cases. Since in many systems every chrom...