题目

Yellowstone Weather Yellowstone National Park is at lofty height. Most of the park is above 2,275 meters. Yellowstone’s weather is unpredictable. In summer, it may be warm and sunny with temperatures in the high 70s. At night in any given month, the temperature may drop close to freezing. So it is best to come prepared for cold evenings and mornings, especially if you are camping or hiking. When you leave your campsite, please leave it prepared for possible thundershower and wind. A sunny warm day may become fiercely stormy with wind, rain, sleet and sometimes snow. Without enough cl人类的外耳道多毛症仅在男性中表现，并呈现父传子、子传孙的特点。控制该性状的基因位于（　　）? A.细胞质 B.常染色体上? C. X染色体上 D. Y染色体上?