X-chromosome inactivation involves ______.

A. the silencing of one X chromosome in each of the cells of human females
B. an error in prenatal gender differentiation
C. the process by which the X chromosome is turned off in all cells of human males
D. a process that occurs in the testes but not in the ovaries


A. the silencing of one X chromosome in each of the cells of human females

History

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a. an international forum on energy consumption. b. talks that led to the United States and USSR cutting defense spending. c. a treaty that normalized relations between Egypt and Israel. d. a meeting that addressed the nation's continuing inflation problems.

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The best known of the Abbasid caliphs was

A) al-Ma'mun. B) Ibn Fadlan. C) Abu al-Abbas. D) al-Mas'udi. E) Harun al-Rashid.

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The Pullman strike of 1894

A. saw the president of the United States order federal troops to break the strike. B. ended when George Pullman dropped his demand that workers live in company housing. C. was ultimately successful for the strikers. D. had little effect on rail transportation throughout the nation. E. ended when Governor John Peter Altgeld called out the militia to protect employers.

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Which god/goddess directs Aeneas to seek Evander?

a. Juno b. Venus c. Jupiter d. the Tiber River e. the nymph of Arcadia

History