In mammals, every cell in females has two X-chromosomes, while every cell in males has a single X-chromosome.
在哺乳动物中，每一个雌性细胞有两条X染色体，而每一个雄性细胞有一条X染色体。
Dosage compensation in female mammals is achieved by inactivating the transcription of one of the X chromosome.
雌性动物的剂量补偿效应是通过细胞中一条X染色体的转录失活来实现的。
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