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During the spermatogenesis of a human (2n=46) with sex chromosomes XY, non-disjunction happens at meiosis II for one of the dyads in one of the two secondary spermatocytes. What are the expected chromosome numbers for the four spermatids at the end of meiosis?

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Read the excerpt below from A Sharecropping Contract (1866).We [Freedmen] furthermore bind ourselves to and with said Ross that we will do good work and labor ten hours a day on an average, winter and summer. . . . We further agree that we will lose all lost time, or pay at the rate of one dollar per day, rainy days excepted. In sickness and women lying in childbed are to lose the time and account for it to the other hands out of his or her part of the crop. . . .We furthermore bind ourselves that we will obey the orders of said Ross in all things in carrying out and managing said crop for said year and be docked for disobedience. All is responsible for all farming utensils that is on hand or may be placed in care of said Freedmen for the year 1866 to said Ross and are also responsible to said Ross if we carelessly, maliciously maltreat any of his stock for said year to said Ross for damages to be assessed out of our wages.In what ways does the contract limit the freedom of the laborers?

What properties of silica sand make it useful in hydraulic fracturing?

Bewerbung um die Stelle als Babysitterin Sehr geehrte Damen und Herren, vor ein paar Tagen habe ich am Schwarzen Brett meiner Sprachschule Ihre Anzeige gelesen. Hiermit möchte ich mich bei Ihnen um die Stelle als Babysitterin bewerben. Weil ich auch in meiner Heimat schon als Babysitterin gearbeitet habe, habe ich natürlich viel Erfahrung. Dort habe ich dreimal die Woche auf die Babys von meinen Bekannten und Freunden aufgepasst. Ich bin sehr zuverlässig, geduldig und kreativ. ( Ich bin nicht nur zuverlässig, sondern auch geduldig und kreativ) Die Arbeit mit Babys macht mir total viel Spaß. Ich hätte aber noch eine Frage: Können Sie mir sagen, wie hoch der Stundenlohn ist? Auf Ihre Antwort freue ich mich. Mit freundlichen Grüßen Liliia Imamutdinova

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