XX

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XX

[ekseks′]
the designation for the normal sex chromosome complement in the human female. See also X chromosome.

XX

Sex chromosomes found in female of the species.
References in classic literature ?
For twenty years Adolph Myers had lived alone in Winesburg.
It would be impossible, I know," replied Elinor, "to convince you that a woman of seven and twenty could feel for a man of thirty-five anything near enough to love, to make him a desirable companion to her.
There was such a rush of heads immediately, to see Number Twenty Seven reading his Hymn Book, that the little hole was blocked up, six or seven heads deep.
The book I had a mind to read, was put up leaning against the wall: I first mounted to the upper step of the ladder, and turning my face towards the book, began at the top of the page, and so walking to the right and left about eight or ten paces, according to the length of the lines, till I had gotten a little below the level of mine eyes, and then descending gradually till I came to the bottom: after which I mounted again, and began the other page in the same manner, and so turned over the leaf, which I could easily do with both my hands, for it was as thick and stiff as a pasteboard, and in the largest folios not above eighteen or twenty feet long.
And, after telling the whole story, under the promise of secrecy, to Gabriel and Mercier, they put the twenty thousand francs into the envelope and without asking for explanations, handed it to Mme.
He had been absent for twenty years, developing water-power and building street- railways in South America.
Fogg; and, turning to the others, he continued: "I have a deposit of twenty thousand at Baring's which I will willingly risk upon it.
de Treville, confiding to him candidly the importance of his departure, when the news was transmitted to him as well as to his three friends that the king was about to set out for Paris with an escort of twenty Musketeers, and that they formed part of the escort.
In fact, of the twenty rose-trees which formed the parterre, not one bore the mark of the slug, nor were there evidences anywhere of the clustering aphis which is so destructive to plants growing in a damp soil.
Around the walls were ranged two and twenty thrones, overhung by canopies of crimson and gold, and provided with the softest of cushions, which were tasselled and fringed with gold cord.
Planchet paid down in double louis, twenty thousand livres to D'Artagnan, on the part of himself (Planchet), and twenty thousand livres, still in double louis, in account with D'Artagnan.
They made twenty miles over a rugged road, gradually approaching a mountain in the northwest, covered with snow, which had been in sight for three days past.

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