In cucumbers, one can make this determination by the presence of higher levels of ethylene promoted by the F/f gene.
In Drosophila, one molecular basis for this characteristic is the production of Sxl protein, which allows for production of the Tra molecule that blocks an intron in the DSX gene, yielding a truncated Dsx protein. In cucumbers, one can make this determination by the presence of higher levels of ethylene promoted by the F/f gene. In humans, those with this characteristic produce a large silencing Xist RNA early in development to carry out the lyonization process. That process serves to inactivate about 85% of a certain chromosome in individuals with this determination, whose phenotypic qualities are seen in individuals with Klinefelter's syndrome. For 10 points, name this characteristic possessed by humans with two X chromosomes.
In Drosophila, one molecular basis for this characteristic is the production of Sxl protein, which allows for production of the Tra molecule that blocks an intron in the DSX gene, yielding a truncated Dsx protein.
{femaleness} [prompt on “{sex determination}”, “{gender determination}”, or the like accept things that {suggest} that {thing we} are {talking} about is {female}]