Describe how having 2X chromosomes may provide a healthy advantage to girls and women?
What will be an ideal response?
Among people who have two X chromosomes, if they carry a recessive, disease-producing, abnormal gene on one X chromosome, the normal gene on the other X chromosome can override the abnormal gene and prevent the expression of the disease. In this case, the individual will be a carrier of the defective gene, but she will not experience the disease. In contrast, among people who have only one X chromosome, if they carry a disease-producing, abnormal gene on that X chromosome, they do not have another X chromosome to overcome the abnormality, thus making them more likely to develop the disease.
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A typical wealthy South Carolina planter __________
A) spent much of his time working his plantation B) lived far away from the coast C) belonged to a powerful social elite D) mainly relied on free labor
Russian immigrant and political activist Emma Goldman
A) strongly opposed birth control. B) lived and died in almost total obscurity. C) was careful to avoid arrest for her activities. D) was in many ways a typical American immigrant.
Which statement best describes Spain at the end of the twelfth century?
a. It was free of Muslim control in the northern half of the country. b. It was a fully united Christian kingdom. c. It was once again completely under the control of the Muslims. d. Spain was the most powerful nation in Europe. e. It was ruled by the Valois dynasty of France.
The Berlin Wall was erected to deter illegal immigration from West Berlin to East Germany
Indicate whether the statement is true or false.